There are 120 people in a theatre. 72 are female and 48 are male. 12 females purchase an ice cream and 31 males purchase an ice cream.
What is Frequency Tree?Frequency trees display the real frequency of certain events. They can display the same data as a two-way table, but frequency trees are more readable since they illustrate the frequency hierarchy. Probability trees depict the likelihood of a series of occurrences.
Solution:
From the question, we can see the there are 120 people in the theatre.
Since, there are 72 females in the theatre we can find the total number of males by 120-72 = 48
Also, the male who purchased Ice Cream were 36 therefore, the males who did not purchased Ice Cream are 48-36 = 12
And, the females who purchased Ice Cream are 41. So, the female who did not purchased Ice Cream are 72 - 41 = 31
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complete question"
there are 120 people in a theatre 72 are female of these 41 purchase an ice cream 36 males purchase and ice cream use this information to compete the frequency tree
Todd spent some time cleaning his room
Jeff spent 11 more minutes cleaning his room room than tod spent.Jeff spent 43
minutes
Answer:
32
Step-by-step explanation:
43-11=32
find the interval i and radius of convergence r for the given power series. (enter your answer for interval of convergence using interval notation.) sigma^[infinity]_n=1 ((−1)^n x n/n)
I=____ I=____ I=____
R=____ R=____ R=____
To find the interval of convergence and radius of convergence for the power series sigma^[infinity]_n=1 ((−1)^n x^n/n), we will use the ratio test.
Ratio test: Let the series sigma^[infinity]_n=1 a_n be a power series centered at x = c. Then, the radius of convergence is given by R = lim_n→∞ |a_n/a_n+1|, if the limit exists.
First, we apply the ratio test:
|(-1)^(n+1) * x^(n+1)/(n+1)| / |(-1)^n * x^n/n|
= |x/(n+1)|
Taking the limit as n → ∞, we get
lim_n→∞ |x/(n+1)| = 0
Therefore, the radius of convergence is R = ∞.
Next, we need to find the interval of convergence. Since R = ∞, the series converges for all x. Thus, the interval of convergence is
I = (-∞, ∞).
Therefore,
I = (-∞, ∞)
R = ∞
To find the interval of convergence (I) and radius of convergence (R) for the given power series, we can use the Ratio Test. The power series is:
Σ(−1)^n * (x^n / n) from n=1 to infinity.
Applying the Ratio Test:
lim (n→∞) |(a_(n+1)) / a_n| = lim (n→∞) |((-1)^(n+1) * x^(n+1) / (n+1)) / ((-1)^n * x^n / n)|
After simplification:
lim (n→∞) |n * x / (n+1)|
Since the (-1) terms cancel out, we are left with:
lim (n→∞) |n / (n+1) * x|
As n approaches infinity, the limit becomes 1, and thus:
|x| < 1
This gives us the interval of convergence (I):
I = (-1, 1)
For the radius of convergence (R), since |x| < 1:
R = 1
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1) Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative.)
f(x) = 1/2 + 5/6^x2 − 4/5^x3
The most general antiderivative of f(x) = 1/2 + 5/6x² − 4/5x³ is F(x) = 1/2x + 5/18x³ − 1/5x⁴ + C, where C is the constant of the antiderivative.
To check this answer, we can differentiate F(x) and see if it gives us back f(x). Taking the derivative of F(x), we get f(x) = d/dx (1/2x + 5/18x³ − 1/5x⁴ + C) = 1/2 + 5/6x² − 4/5x³, which matches the original function f(x). Therefore, F(x) is the most general antiderivative of f(x).
The constant of integration, denoted by C, is added because when taking the derivative of a constant, it is equal to zero. Thus, the constant of integration can be any real number, and it is included in the antiderivative to account for all possible functions that have f(x) as their derivative.
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a federal report indicated that 17 % of children under age 6 live in poverty in washington, an increase over previous years. how large a sample is needed to estimate the true proportion of children under age living in poverty in washington within with confidence? round the intermediate calculations to three decimal places and round up your final answer to the next whole number.
We would need a sample size of at least 1073 children under age 6 in Washington to estimate the true proportion of children living in poverty with 95% confidence and a margin of error of 2%.
To estimate the true proportion of children under age 6 living in poverty in Washington with 95% confidence and a margin of error of 2%, we can use the formula:
n = (Z² * p * q) / E²
where:
Z = the Z-score corresponding to the desired confidence level (1.96 for 95% confidence)
p = the estimated proportion (0.17 based on the federal report)
q = 1 - p
E = the desired margin of error (0.02)
Plugging in these values, we get:
n = (1.96² * 0.17 * 0.83) / 0.02²
n = 1072.45
Rounding up to the next whole number, we would need a sample size of at least 1073 children under age 6 in Washington to estimate the true proportion of children living in poverty with 95% confidence and a margin of error of 2%.
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What will be the graph of the function f(x) = 2x + 26
The graph of the function f(x) = 2x + 26 will be a line graph.
Some key points about the graph:
• The slope of the line will be 2.
• The y-intercept will be 26, since f(0) = 26.
• The line will pass through the points (0, 26) and (x, 2x + 26).
• As x increases, the value of f(x) also increases but at a increasing rate.
• The graph will be a positively sloped line, increasing from left to right.
A rough sketch of the graph would be:
y
26
24
22
20
18
16
14
12
10
8
6
4
2
-6 -4 -2 0 2 4 6 8 10 12 14 x
Does this help explain the graph? Let me know if you have any other questions!
Suppose a certain country's population has constant relative birth and death rates of 97 births per thousand people per year and 47 deaths per thousand people per year respectively. Assume also that approximately 30,000 people emigrate (leave) from the country every year. Which equation best models the population P- Pt) of the country, where t is in years? dP - 50P30000 Oat 30000 dit d0.05P30000 it 0.5P30000 dP 0.5P 30 ait
The equation that best models the population P(t) of the country, given the constant relative birth and death rates and the number of people emigrating every year, is dP/dt = 0.5P - 30,000.
The rate of population growth is determined by the difference between the birth rate and the death rate, which is (97 - 47) per thousand people per year, or 0.05. This means that the population will grow by 0.05 times the current population each year if there is no emigration. However, since 30,000 people emigrate every year, we need to subtract this number from the population growth rate. Therefore, the rate of population growth can be expressed as 0.05P - 30,000.
To get the population at any given time t, we need to integrate this rate equation concerning time t. The solution to this differential equation is P(t) = (P0 - 60,000)e^(0.05t) + 60,000, where P0 is the initial population at time t=0.
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1. CVSTM is having a sale on vitamins. You purchase 2 bottles of multivitamins at
$3.75/bottle, 1 bottle of vitamin D supplement that costs $4.85, and 2 vitamin C
supplement bottles at $2.95/bottle. How much money would be left before tax if you
had $20 to spend on this purchase?
2. You need 2,500 calories a day as a growing teenager who only moderately
exercises. If you consumed a meal at McDonald's that consisted of 1 Quarter
Pounder with cheese (520 calories), 1 small fries (220 calories), and a large Coke
(290 calories), how many calories would you have left to consume the
rest of the day?
3. Your Aunt Barbara gave you $500 to spend on books for your first semester
of college classes. You purchased the recommended biology book at $209.59, the
biology lab manual at $59.33, a psychology book at $121.35, an English book at
$137.95, a math book at $107.14, and the math student workbook at $36.96. How
much more money will you still need to purchase your books for this semester's four
classes?
4. The digestive tract is approximately 30 feet long. Food enters the stomach after
passing through the 10-inch esophagus. How many more inches will food need to
travel prior to exiting the body?
5. You have recently been diagnosed with the flu. Your doctor tells you to take 400 mg
of Tylenol every 4 hours to control your fever. If you purchased a bottle of Tylenol that
contains fifty 200 mg tablets, how many tablets would be left in the bottle after 3 days
if you followed your doctor's orders?
6. The medical assistant takes the oral temperature of every patient upon arrival. The
clinic sees 45 patients each day. How many weeks would a 500-count box of
thermometer probe covers last if the clinic is open 5 days per week?
Answer:
1: $1.75
2: 1470 calories
3: $172.32
4: 350 in
5: 14 tabs
6: 2.22 weeks
Step-by-step explanation:
1: (2*3.75)+(1*4.85)+(2*2.95) = 18.25
20-18.25 = 1.75 dollars
2: 2500-(520+220+290) = 1470 cal
3: 209.59+59.33+121.35+137.95+107.14+36.96 = 672.32
672.32-500 = 172.32 dollars
4: (30*12)-10 = 350 in
5: (3*24)/4 = 18 total doses in 3 days,
2 tabs per dose -> 18*2 = 36 tablets taken
50-36 = 14 tabs
6: 45*5 = 225 patients per week
500/225 = 2.22 weeks
Explain one possible way to shade the three shapes to represent a total of 7/5. In your explanation, at least one part of each shape must be shaded. Explain why your shading is correct. • One shape is removed. Explain how to decompose g into the sum of two fractions. Give an example in the form of _ + _ = 7/5 and explain how the two remaining shapes would be shaded.
The ways in which we can shade the shape to get the total is: Shape 1: 3/5 shaded. Shape 2: 2/5 shaded. Shape 3: 2/5 shaded. To decompose g we use 7/5 = 4/5 + 3/5.
What are fractions?To express a quantity that is a portion of a whole, use fractions. They are made up of a denominator and a numerator, two integers separated by a horizontal line. The denominator is the total number of equally sized components that make up the whole, while the numerator is the portion of the whole that is being taken into account.
Because they are different ways of expressing the same quantity, decimals and percentages have a relationship to fractions. With a base of 10, decimals can be used to express fractions, with each digit standing for a different power of 10.
Given that, the total shaded area must be 7/5.
The ways in which we can shade the shape to get the total is:
Shape 1: 3/5 shaded
Shape 2: 2/5 shaded
Shape 3: 2/5 shaded
Now, for two shapes we can use the addition of two fractions as follows:
7/5 = 4/5 + 3/5
The example of the form is:
7/5 = 4/5 + 3/5
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. find a set of smallest possible size that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets
Hi! To find a set of the smallest possible size that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets, follow these steps:
1. List out the given subsets: {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10}.
2. Combine the elements of both subsets without repeating any numbers: {1, 2, 3, 4, 5, 6, 8, 10}.
3. The combined set is {1, 2, 3, 4, 5, 6, 8, 10}, which has a size of 8.
So, the smallest possible set that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets is {1, 2, 3, 4, 5, 6, 8, 10}.
The smallest possible set that includes both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} subsets is {1, 2, 3, 4, 5, 6, 8, 10}.
To find a set of the smallest possible size that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets, follow these steps:
1. Identify the given subsets: {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10}.
2. Combine the elements from both subsets without repeating any numbers.
3. Organize the combined elements in ascending order.
Your answer: The smallest possible set that includes both subsets is {1, 2, 3, 4, 5, 6, 8, 10}.
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Hi! To find a set of the smallest possible size that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets, follow these steps:
1. List out the given subsets: {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10}.
2. Combine the elements of both subsets without repeating any numbers: {1, 2, 3, 4, 5, 6, 8, 10}.
3. The combined set is {1, 2, 3, 4, 5, 6, 8, 10}, which has a size of 8.
So, the smallest possible set that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets is {1, 2, 3, 4, 5, 6, 8, 10}.
The smallest possible set that includes both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} subsets is {1, 2, 3, 4, 5, 6, 8, 10}.
To find a set of the smallest possible size that has both {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10} as subsets, follow these steps:
1. Identify the given subsets: {1, 2, 3, 4, 5} and {2, 4, 6, 8, 10}.
2. Combine the elements from both subsets without repeating any numbers.
3. Organize the combined elements in ascending order.
Your answer: The smallest possible set that includes both subsets is {1, 2, 3, 4, 5, 6, 8, 10}.
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determine if the argument is valid or a fallacy. give a reason to justify answer. if i'm hungry, then i will eat. i'm not hungry. i will not eat.
The argument is valid. According to modus tollens, the conclusion "I will not eat" logically follows
The argument follows a valid logical form known as modus tollens, which is a valid deductive argument form. Modus tollens states that if a conditional statement (e.g., "if A, then B") is true and the consequent (B) is false, then the antecedent (A) must also be false.
In this argument, the conditional statement is "If I'm hungry, then I will eat" (A = I'm hungry, B = I will eat), and the premise "I'm not hungry" establishes that the consequent (B) is false.
Therefore, according to modus tollens, the conclusion "I will not eat" logically follows
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Which of the following fractions are equal to 3/4?
Answer:
6/8, 9/12, 12/16, 15/20
Step-by-step explanation:
If you simplify the fractions it will all equal 3/4.
Simplify by finding the Greatest Common Factor and dividing both numbers by the GCF.
determine the number of 3-permutations of a set of cardinality eight.
The number of 3-permutations of a set of cardinality eight is 336.
To determine the number of 3-permutations of a set of cardinality eight, we need to calculate the number of ways to arrange three distinct elements from an eight-element set.
This is done using the formula for permutations: P(n, r) = n! / (n - r)!, where n is the number of elements in the set, and r is the number of elements to be arranged. In this case, n = 8 and r = 3.
Applying the formula: P(8, 3) = 8! / (8 - 3)!. Calculate factorials: 8! = 40,320 and 5! = 120. Finally, divide 40,320 by 120 to get the answer: 336.
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Area = ?
As in the picture attached.
The area of the shaded area is 0.314m²
How did we reach this conclusion?First let's analyze the shape.
It comprises:
A square whose side length is 1m
Then there is the circle that passes through a corner of the square and is tangent to the opposite two sides of the square. So the region shaded in blue is the region contained by the circle and the square but not common to both shapes.
To get the area of this portion shaded in blue, here is what we must do:
So the Area of the region shaded blue is:
Area of the circle + area of the square - 2 x Area of the overlapping area.
To further help our analysis, we must deconstruct this shape into familiar ones by creating a composite right triangle as shown in the attached image.
Since we have a right triangle, the arc that it subtends will be a 180° arc thus, the hypotenuse of the triangle is the diameter of the circle.
Thus, when we created a right triangle from the shape, we also carved out a semi-circle.
This means that the overlapping areas are:
Area of the composite right triangle + the Area of the Semi Circle.
Since we now have two semi circles, we can cancel out the area of the circle above.
Our new equation for the area shaded in blue becomes:
The area of the square - the area of 2 Right Triangles
Now we can being to compute for the area of the shapes:
Taking the right triangle firs, create a line from the radius bisecting the triangle at 90 degrees. This gives us two equal smaller right triaangles.
Since the ∠90 is bisected, this means that the sides will be r√2 and the height of both right triangles = r (radius)
extending the radius into the opposite direcitn, we now have the diagonal of the square.
Diagonal = r + r√2 = √2
Solving for r we say:
r(1+√2) = √2
r = √2/(1+√2)
To further simplify the above, we can multiply it by the conjugate:
r = √2/(1+√2) x (1-√2)/(1-√2)
Thus,
r = 2-√2
So since the length of the square is 1m, then the area = 1x1 = 1m
The area of the composite triangle =( r√2 x r√2)/ 2 = r²
Since the area of the shaded region as given above is
The area of the square - the area of 2 Right Triangles
Then it's area = 1 - 2r²
We can simplify this further to get:
1-2(2-√2)²
= 8 √2 - 11m²
area of the shaded region ≈ 0.314m²
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suppose that n(u ) = 200 , n(e ∪ f ) = 194 , n(e) = 106 , and c n(e ∩ f ) = 73 . find each of the following values. n (e ∪ f)c
N(e ∪ f) = 194.
Using the inclusion-exclusion principle, we have:
n(e ∪ f) = n(e) + n(f) - n(e ∩ f)
We are given n(e ∩ f) = 73 and n(e ∪ f) = 194, so we can rearrange to solve for n(f):
n(f) = n(e ∪ f) - n(e) + n(e ∩ f)
n(f) = 194 - 106 + 73
n(f) = 161
Finally, to find n(e ∪ f), we can substitute the values we have found into the first equation:
n(e ∪ f) = n(e) + n(f) - n(e ∩ f)
n(e ∪ f) = 106 + 161 - 73
n(e ∪ f) = 194
Therefore, n(e ∪ f) = 194.
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Complete the table to make a proportional relationship between weight and price.
CLEAR CHECK
Weight Price
2
lb. $7.00
5
lb. $
The measure of the missing part of proportion is 17.50
Since the relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
Given that Weight Price 2 -lb. $7.00
5 - lb. $
1: 3.50 dollars
Now multiply by 5 on each side
5 : 17.50
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This is exercise 20 in chapter 2 - but this time i would need to Repeat Exercise 20 in Chapter 2 , using the ADT list to implement the function f (n). Consider the following recurrence relation: F (1) = 1; f (2) = 1; f(3) =1; f(4) =3; f(5) = 5; f (n) = f( n -1 ) + 3 x f(n-5) for all n > 5 Compute f(n ) for the following values of n : 6, 7, 12, 15. If you were careful, rather than computing f (15) from scratch (the way a recursive C++ function would compute it), you would have computed f (6), then f (7), then f(8), and so on up to f(15), recording the values as you computed them. This ordering would have saved you the effort of ever computing the same value more than once. (Recall the iterative version of the rabbit function discussed at the end of this chapter.) Note that during the computation
Using the ADT list, we can implement the function f(n) to compute the values of the recurrence relation F(n) = F(n-1) + 3 x F(n-5), for n > 5, where F(1) = 1, F(2) = 1, F(3) = 1, F(4) = 3, and F(5) = 5.
By computing the values of f(n) in an ordered manner, we can avoid computing the same value more than once. We can use this approach to compute f(6), f(7), f(12), and f(15).
We will use the ADT list to implement the function f(n) to compute the values of the recurrence relation F(n) = F(n-1) + 3 x F(n-5), for n > 5, where F(1) = 1, F(2) = 1, F(3) = 1, F(4) = 3, and F(5) = 5. We will compute the values of f(n) in an ordered manner to avoid computing the same value more than once.
First, we initialize an empty list to store the values of f(n). Then, we add the initial values of f(1), f(2), f(3), f(4), and f(5) to the list.
Next, we use a for loop to compute the values of f(n) for n = 6 to 15. Inside the for loop, we use the recurrence relation F(n) = F(n-1) + 3 x F(n-5) to compute the value of f(n). We check if the value of f(n) has already been computed by checking if the length of the list is greater than or equal to n.
If the value has already been computed, we skip the computation and move on to the next value of n. Otherwise, we add the computed value of f(n) to the end of the list.
After the for loop, the list contains the values of f(1) to f(15). We can extract the values of f(6), f(7), f(12), and f(15) from the list and print them out.
For example, the Python code to implement the above approach is:
# Initialize an empty list to store the values of f(n)
f_list = []
# Add the initial values of f(1), f(2), f(3), f(4), and f(5) to the list
f_list.extend([1, 1, 1, 3, 5])
# Compute the values of f(n) for n = 6 to 15
for n in range(6, 16):
if len(f_list) >= n:
# Value of f(n) has already been computed
continue
else:
# Compute the value of f(n) using the recurrence relation
f_n = f_list[n-2] + 3 * f_list[n-6]
# Add the computed value to the end of the list
f_list.append(f_n)
# Extract the values of f(6), f(7), f(12), and f(15) from the list
f_6 = f_list[5]
f_7 = f_list[6]
f_12 = f_list[11]
f_15 = f_list[14]
Print out the values of f(6), f(7), f(12), and f(15)
print("f(6)).
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find the exact value of cos 105 degrees by using the half-angle formula
The exact value of the cos 105 degrees by the using the half angle formula is -0.2588.
To find the exact value of cos(105°) using the half-angle formula, we first need to express 105° as half of another angle. Since 105° is equal to 210°/2,
we can use the half-angle formula for cosine:
cos(x/2) = ±√[(1 + cos(x))/2]
In our case, x = 210°. Now, we need to find the value of cos(210°):
210° lies in the third quadrant, where both sine and cosine are negative. To find the reference angle, subtract 180°:
210° - 180° = 30°
So, cos(210°) = -cos(30°) = -√3/2.
Now, let's plug the value of cos(210°) into the half-angle formula:
cos(105°) = ±√[(1 - √3/2)/2]
Since 105° lies in the second quadrant, where cosine is negative, we choose the negative root:
cos(105°) = -√[(1 - √3/2)/2]
=-0.2588
Explanation:- Here to find the value of the cosine 105 degree by using the half angle formula first we write the half angle formula of the cosine and substituted x=210 degree and simplify.
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Determine the components of the compound statement. (Select all that apply.) 7 + 1 2 7 □7,1,7 □ 7+1 □74157 □7+1=7 □27
The compound statement is not entirely clear as it contains several separate expressions. However, I can break down and analyze each of the parts:
7 + 1 2 7: This is a mathematical expression that represents the sum of 7, 1, and 27, which evaluates to 35.
7,1,7: This is a list of three individual numbers.
7+1: This is a mathematical expression that represents the sum of 7 and 1, which evaluates to 8.
74157: This is a five-digit number with no apparent mathematical relationship to the other expressions.
7+1=7: This is a mathematical equation that tests the equality of the expressions 7+1 and 7. Since 7+1 is not equal to 7, this equation is false.
27: This is a single number that is not obviously related to the other expressions.
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Consider the following hypothesis problem. n = 30 s2 = 625 H0: σ2 =500 Ha:σ2≠500 The test statistic equals a. .63. b. 12.68. c. 13.33. d. 13.68.
The required ‘test statistic’ is 36.25
To solve this problem, we'll use the Chi-squared test statistic for testing the variance of a population. Here are the steps:
Identify the given information:
- Sample size (n) = 30
- Sample variance (s²) = 625
- Null hypothesis (H₀): σ² = 500
- Alternative hypothesis (Hₐ): σ² ≠ 500
Calculate the degrees of freedom (df) using the formula: df = n - 1
- df = 30 - 1 = 29
Calculate the Chi-squared test statistic (χ²) using the formula: χ² = (n - 1) * (s² / σ²)
- χ² = (29) * (625 / 500)
Compute the test statistic value:
- χ² = 29 * (1.25) = 36.25
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The volume of air in a person's lungs can be modeled with a periodic function. The
graph below represents the volume of air, in mL, in a person's lungs over time t,
measured in seconds.
What is the period and what does it represent in this
context?
Volume of air (in ml.)
3000
2500
2000
1900
1000
300
(2.5, 2900)
(5-5, 1100)
Time (in seconds)
(8.5, 2900)
(11.5, 1100)
The period of this function is 6 seconds and it means the time it takes for a person's lung to inhale and exhale in a full cycle.
How to find the period ?The function's period alludes to the duration required for one complete cycle, culminating in its initial point. Furthermore, this term represents the length of time necessary for a person's lungs to perform a full inhalation and exhalation sequence.
To determine the period, it is integral to recognize the temporal gap between two successive peaks (or troughs) on the chart. This interval deviation precludes:
8. 5 - 2. 5 = 6 seconds
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20. The table below shows the cost of flying from San Francisco to various other cities in the United States. There is a relationship between the distance you are flying and the cost of your plan ticket. The data from the table is represented on the scatter plot. Distance (miles) Cost of the plane ticket ($) 300 Cost of 250 plane ticket ($) 200 150 100 0 374 1,240 200 600 143 125 250 725 150 110 180 1,100 950 1,500 224 180 250 500 750 1000 1250 Distance (miles) 500 164 A) Draw a line of best fit and pick two good points from the table that are on your line B) Determine the equation for the line of best fit.
Having drawn and attached the scatter plot for the given data, the equation for the line of best fit is y = 0.083x + 97.55
How did we arrive at the above conclusion?
After plotting the scatter point, we choose two points on the line of best fit that are far apart.
The points chosen are:
(150, 110) And (1240, 200)
Using the slope-intercept form we proceed to find the equation
y = mx + b
y = cost of plane tickets
x = distance
m = slope
m = (y2-y1)/(x2-x1)
m = (200-110) / (1240 - 150)
m = 0.083
So, we can state
y = mx + b
110 = 0.083 * 150 + b
b = 97.55
hence,
the line of best fit is:
y = 0.083x + 97.55
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Question 18 of 26
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Given
�
(
�
)
=
−
2
�
−
2
f(x)=−2x−2, find
�
−
1
(
�
)
f
−1
(x).
The value of f ⁻¹ (x) would be,
⇒ f⁻¹(x) = - x/2 - 1
We have to given that;
Function is,
⇒ f (x) = - 2x - 2
Now, We can find the inverse of function as;
⇒ f (x) = - 2x - 2
⇒ y = - 2x - 2
Solve for x;
⇒ y + 2 = - 2x
⇒ x = - (y + 2)/2
⇒ x = - y/2 - 1
⇒ f⁻¹(x) = - x/2 - 1
Thus, The value of f ⁻¹ (x) would be,
⇒ f⁻¹(x) = - x/2 - 1
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1. An online store sells sportswear. Of all online sales, it is known that the amount of each sale is right skewed with mean $55 and standard deviation $19. A sample of 50 sales is randomly selected.(a). Find the mean of the sampling distribution of the mean amount spent per sale for samples of size 50.(b).Find the standard deviation of the sampling distribution from part (a). (Round your answer to three decimal places.)
The following parts can be answered by the concept of standard deviation.
a. The population mean is $55.
b. The standard deviation of the sampling distribution is approximately 2.688 (rounded to three decimal places).
(a) The mean of the sampling distribution of the mean amount spent per sale for samples of size 50 is equal to the population mean. In this case, the population mean is $55.
(b) To find the standard deviation of the sampling distribution, we use the formula:
Standard deviation of the sampling distribution = (Population standard deviation) / sqrt(sample size)
In this case, the population standard deviation is $19 and the sample size is 50. Plugging these values into the formula, we get:
Standard deviation of the sampling distribution = 19 / sqrt(50) ≈ 19 / 7.071 ≈ 2.688
So, the standard deviation of the sampling distribution is approximately 2.688 (rounded to three decimal places).
Therefore,
a. The population mean is $55.
b. The standard deviation of the sampling distribution is approximately 2.688 (rounded to three decimal places).
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find all points at which the direction of fastest change of the function f(x, y) = x2 y2 − 6x − 8y is i j. (enter your answer as an equation.)
The required equation is [tex]x^2y^4 + 4x^3y^3 - 4x^2y^2 - 12x^2y[/tex] + 25 = 0
How to find points at which the direction of fastest change of the function?The direction of fastest change of a function at a point is given by the gradient of the function at that point. Therefore, to find the points at which the direction of fastest change of the function f(x, y) = [tex]x^2 y^2[/tex] − 6x − 8y is in the direction of the vector i j, we need to find the gradient of f(x, y) and then find the points where the gradient is parallel to the vector i j.
The gradient of f(x, y) is given by:
∇f(x, y) = <∂f/∂x, ∂f/∂y> =[tex]< 2xy^2 - 6, 2x^2y - 8 >[/tex]
To find the points at which the direction of fastest change is in the direction of i j, we need to find the points where the gradient is parallel to i j. This means that the dot product of the gradient and i j should be equal to the product of their magnitudes:
∇f(x, y) · i j = ||∇f(x, y)|| ||i j||
Substituting the values, we get:
[tex](2xy^2 - 6, 2x^2y - 8)[/tex]· (1, 0) = sqrt(([tex]2xy^2 - 6)^2 + (2x^2y - 8)^2[/tex]) * sqrt([tex]1^2 + 0^2[/tex])
Simplifying this equation, we get:
[tex]2xy^2[/tex]- 6 = sqrt(([tex]2xy^2 - 6)^2[/tex] + ([tex]2x^2y - 8)^2[/tex])
Squaring both sides and simplifying, we get:
[tex]x^2y^4 + 4x^3y^3 - 4x^2y^2 - 12x^2y + 25 = 0[/tex]
Therefore, the points at which the direction of fastest change of f(x, y) is in the direction of i j are given by the solution of the quartic equation above.
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Let a, b E N, with a > 0 and b > 0. (a) Let p, q, r, s be the unique integers such thata = qb + r,0 < r < b,b = pr+s,0 < s
The Euclidean algorithm gives gcd(a,b) = gcd(b,r) and gcd(b,r) = gcd(r,s).
The Euclidean algorithm is a recursive algorithm to find the greatest common divisor (gcd) of two integers a and b. It works by repeatedly finding the remainder of the division of the larger number by the smaller number, until the remainder is 0, at which point the gcd is the last non-zero remainder.
When applying the algorithm to a and b with a > b, we can write a = qb + r, where q is the quotient and r is the remainder. Then, we apply the algorithm to b and r to find the gcd(b,r), and so on until we reach 0. At each step, the gcd of the current pair of numbers is equal to the gcd of the previous pair, since any common divisor of the current pair must also divide the previous pair. Therefore, we have gcd(a,b) = gcd(b,r) = gcd(r,s), where s is the final non-zero remainder.
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The power P
in a motor is given by the formula P=IV
I=
current, V=
voltage. Find P
when I=64. 1
, V=12. 8
The power (P) when I = 64.1 A and V = 12.8 V is 819.68 watts (W).
Hello! I understand that you need help in finding the power (P) when the current (I) is 64.1 A and the voltage (V) is 12.8 V.
Understand the relationship between power, current, and voltage.
The power (P) in an electrical circuit can be calculated using the formula P = I × V,
where I is the current in amperes (A) and V is the voltage in volts (V).
Plug in the given values.
In this case, we are given I = 64.1 A
and V = 12.8 V.
Plug these values into the formula:
P = 64.1 A × 12.8 V
Calculate the power.
Multiply the current and voltage to find the power:
P = 819.68 W.
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Coach McMillan sets out plastic cones for the players on his soccer team to use in drills. Each cone has a diameter of 7.2 inches and a height of 11.5 inches. What
is the volume of each cone? Round to the nearest tenth.
Answer:
624 rounded 624.3 not rounded
Step-by-step explanation:
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Solve the separable differential equation for u, du/dt = e^5u+5t. Use the following initial condition: u(0) = 15.
Th solution of the given seperable differential equation is :
u = (1/5)ln(25t^2 + e^75)
To solve the separable differential equation for u, we need to separate the variables and integrate both sides.
First, we can write the equation as:
(1/e^5u)du = 5t dt
Now we can integrate both sides:
∫(1/e^5u)du = ∫5t dt
To integrate the left side, we can use u-substitution:
Let u = 5u
Then du = 5e^5u du
Substituting into the integral, we get:
(1/5)∫e^5u du = ∫5t dt
(1/5)e^5u = 5t^2/2 + C
Where C is the constant of integration.
Now we can solve for u:
e^5u = 25t^2 + 2C
Taking the natural logarithm of both sides:
5u = ln(25t^2 + 2C)
u = (1/5)ln(25t^2 + 2C)
Using the initial condition u(0) = 15, we can solve for C:
15 = (1/5)ln(2C)
ln(2C) = 75
2C = e^75
C = (1/2)e^75
Substituting this value of C into our solution for u, we get:
u = (1/5)ln(25t^2 + e^75)
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Tolerable misstatement $155,000 expected misstatement $55,000 desired confidence level moderate risk of material misstatement low total gross balance in inventory $5,500,000. 1. What should our sample size be given the above information? (Hint:you do not need to include the items you are testing 100% from in this answer, only items you are sampling) 2. Using ratio projection, calculate the total projected misstatement based upon the following information:
Using a table of sample sizes and factors for ratio estimation, we find that a sample size of 90 items is appropriate and based on the information provided, we can project a total misstatement of $405,480.67 using ratio projection.
1. To determine the sample size given the information provided, we can use the formula:
Sample size = (Tolerable misstatement / Expected misstatement)² x (Total gross balance in inventory / Sampled balance)
Plugging in the values, we get:
Sample size = ($155,000 / $55,000)² x ($5,500,000 / Sampled balance)
Sample size = 6.73 x ($5,500,000 / Sampled balance)
Assuming a moderate risk of material misstatement, we can use a confidence level of 95%, which corresponds to a Z-score of 1.96. Using a table of sample sizes and factors for ratio estimation, we find that a sample size of 90 items is appropriate.
2. To calculate the total projected misstatement using ratio projection, we first need to determine the ratio of misstatement in the sample to the total inventory. We can do this using the formula:
Ratio of misstatement = Sample misstatement / Sampled balance
Assuming the expected misstatement of $55,000 and a sample size of 90 items, we can set a sampling interval of:
Sampling interval = Total gross balance in inventory / Sample size
Sampling interval = $5,500,000 / 90
Sampling interval = $61,111.11
Using systematic sampling, we can select every 61,111th item from the inventory. Let's say our sample includes 3 items with misstatements totaling $4,500. Then the ratio of misstatement would be:
Ratio of misstatement = $4,500 / Sampled balance
To project the total misstatement, we can use the formula:
Total projected misstatement = Ratio of misstatement x Total gross balance in inventory
Plugging in the values, we get:
Total projected misstatement = ($4,500 / Sampled balance) x $5,500,000
Since we don't know the actual sampled balance, we can use the average sampled balance as an estimate. Assuming an equal distribution of items, the average sampled balance would be:
Average sampled balance = Total gross balance in inventory / Sample size
Average sampled balance = $5,500,000 / 90
Average sampled balance = $61,111.11
Plugging this value in, we get:
Total projected misstatement = ($4,500 / $61,111.11) x $5,500,000
Total projected misstatement = 0.0736 x $5,500,000
Total projected misstatement = $405,480.67
Therefore, based on the information provided, we can project a total misstatement of $405,480.67 using ratio projection.
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Jetia mixes 5 parts cranberry juice with 8 parts apple juice to make 177 cups of
Answer: 108 cups of cranberry juice. Brainliest?
Step-by-step explanation:
mixed juice. How many cups of cranberry juice did Jetia use?
Let's start by assuming that Jetia used x cups of cranberry juice to make the mixed juice. Then, since the ratio of cranberry juice to apple juice is 5:8, she must have used (5/8)x cups of apple juice.
We know that the total amount of mixed juice is 177 cups, so we can set up an equation based on the total amount of juice:
x + (5/8)x = 177
Simplifying this equation, we get:
(13/8)x = 177
Multiplying both sides by 8/13, we get:
x = 108
Therefore, Jetia used 108 cups of cranberry juice to make the mixed juice.