a. For a score of X = 70, a standard deviation of σ = 4 would give a better grade.
b. For a score of X = 80, both standard deviations would give the same grade.
a. To determine which standard deviation would give a better grade for a score of X = 70, we can compare the z-scores associated with each standard deviation.
The z-score measures the number of standard deviations a given value is from the mean.
For σ = 4:
Z = (X - μ) / σ
Z = (70 - 78) / 4
Z = -2
For σ = 8:
Z = (X - μ) / σ
Z = (70 - 78) / 8
Z = -1
The z-score for σ = 4 is -2, while the z-score for σ = 8 is -1. A higher z-score indicates a better grade since it represents a score that is further above the mean.
Therefore, in this case, a standard deviation of σ = 4 would give a better grade.
b. Similarly, for a score of X = 80:
For σ = 4:
Z = (X - μ) / σ
Z = (80 - 78) / 4
Z = 0.5
For σ = 8:
Z = (X - μ) / σ
Z = (80 - 78) / 8
Z = 0.25.
The z-score for σ = 4 is 0.5, while the z-score for σ = 8 is 0.25.
Again, a higher z-score indicates a better grade.
Therefore, in this case, a standard deviation of σ = 4 would give a better grade.
In both scenarios, a standard deviation of σ = 4 would result in a better grade compared to σ = 8.
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Find the measurement of each angle in a triangle. You need to provide me 3 different measurement of angles. please help !!
Answer:
x=30 degrees, 2x=60 degrees, 3x=90 degrees
Step-by-step explanation:
in a triangle the sum of angles is 180 so
x+2x+3x=180
6x=180
x=180/6
x=30
so the angle x is 30 degrees, the angle that is 2x is 60 degrees and the angle the angle 3x is 90
A particular type of vaccine comes in a Brand-1 and a Brand-2. Sixty-five percent
of all patients at a certain vaccination centre want the Brand-2.
i) Among ten randomly selected patients who want this type of vaccine, what
is the probability that at least six want the Brand-2?
ii) Among ten randomly selected patients, what is the probability that the
number who want the Brand-2 vaccine is within 1 standard deviation of
the mean value?
iii) The store currently has seven vaccines of each brand. What is the probability that all of the next ten patients who want this vaccine can get the brand
of vaccine they want from current stock?
i) Probability of at least six patients wanting Brand-2: P(X ≥ 6)
ii) Probability of number of patients within 1 standard deviation of mean: P(μ - σ ≤ X ≤ μ + σ)
iii) Probability that all ten patients get their desired brand from current stock: (7/14) * (6/13) * ... * (1/5)
i) The probability of at least six patients wanting Brand-2 out of ten randomly selected patients can be calculated using the binomial distribution. We need to sum the probabilities of six, seven, eight, nine, and ten patients wanting Brand-2.
The probability can be calculated as P(X ≥ 6) = P(X = 6) + P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10), where X follows a binomial distribution with n = 10 and p = 0.65. The answer is the sum of these individual probabilities.
ii) To calculate the probability of the number of patients who want the Brand-2 vaccine being within 1 standard deviation of the mean value, we need to find the range of values that fall within one standard deviation of the mean.
We can use the normal approximation to the binomial distribution since n = 10 is reasonably large. We calculate the mean (μ) and standard deviation (σ) using μ = n * p and σ = √(n * p * (1 - p)), where p = 0.65. Then we calculate the probability of the number of patients falling within the range μ - σ to μ + σ.
iii) Since there are seven vaccines of each brand in stock, the probability that all ten patients who want the vaccine can get the brand they want from the current stock is equal to the probability of the first patient getting their desired brand (7/14) multiplied by the probability of the second patient getting their desired brand (6/13), and so on until the tenth patient (1/5). The final probability is the product of these individual probabilities.
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what is 34.6285 rounded to the nearest hundreds
Answer:
34.63
Step-by-step explanation:
The 2 in 34.6285 marks the hundredths place
We can round by seeing what number is to the right of it which is 8.
Since 8 is larger than 5, we round up by 1.
Thus, 34.63 is our answer
The answer is:
34.63
Work/explanation:
Rounding to the nearest hundredth means rounding to 2 decimal places (DP).
So we have 2 decimal places, and the 3rd one matters too because it will determine the value of the 2nd DP.
The third DP is 8. Since it's greater than 5, then the value of the 2nd DP will be rounded up. I will add 1 to it.
Remember that we round up when the digit that we're rounding to is followed by another digit that is greater than or equal to 5.
So we round :
[tex]\bf{34.6285 =\!=\!\!\! > 34.63}[/tex]
Therefore, 34.6286 rounded to the nearest hundredth is 34.63.NO LINKS!! URGENT HELP PLEASE!!
26. What is the ratio of a/c?
Reason:
Tangent is the ratio of opposite over adjacent.
The side 'a' is opposite reference angle 52, while c is adjacent to this angle.
Using a calculator, tan(52) = 1.27994 approximately.
Answer:
Tan 52°
Step-by-step explanation:
Since the Tangent of angle is given by the ratio of opposite to the adjacent.
So, Here
Tan 52°= opposite/adjacent
Tan 52°=a/c
Therefore, the ratio of a/c is Tan 52°
Mrs Johnson's latest test had an odd number of total marks. I got 84%. How many marks did I get?
Answer:168
Step-by-step explanation:Let's denote the total number of marks as "M."
Marks obtained = (84/100) * M
For example, if the total marks were 200, then:
Marks obtained = (84/100) * 200 = 168
Answer:
21
Step-by-step explanation:
If you got 84% then divide it by 100%. 100%/84%=21/25 check.
[tex] \frac{21}{25 } \times \frac{100}{1} = 84[/tex]
which equation could use the find the length of the hypotenuse
0 6² + 11² - c²
0 6²+c² - 11²
Oc²-6²-11²
0 11²-6²-c²
Answer:
A. 6² + 11² = c²
Step-by-step explanation:
The correct equation to find the length of the hypotenuse in a right triangle is the Pythagorean theorem, which states that the square of the length of the hypotenuse is equal to the sum of the squares of the other two sides.
In this case, if we assume that the length of one side is 6 and the length of the other side is 11, the correct equation would be:
A. 6² + 11² = c²
This equation can be simplified as follows:
36 + 121 = c²
157 = c²
Therefore, the correct equation to find the length of the hypotenuse in this case is A. 6² + 11² = c².
Naomi wants to save $100,000, so she makes quarterly payments of $1,500 into an account that earns 4.4%/a compounded quarterly. (If you are using TVM Solver, please ensure you provide screenshots of your work or breakdown how you entered everything into the solver).
How long will it take her to reach her goal?
Would doubling her payment amount save her half the time needed to save? Support your statement.
Naomi will take approximately 93 quarters (around 23 years and 3 months) to save $100,000 by making quarterly payments of $1,500 with a 4.4% interest rate.
Doubling her payment amount would save her time, but the exact time saved would require recalculating with the new payment amount.
To calculate the time it will take for Naomi to reach her goal of $100,000, we can use the future value formula for a series of periodic payments:
FV = P * [(1 + r)^n - 1] / r
Where:
FV = Future value (goal amount) = $100,000
P = Payment amount per period = $1,500
r = Interest rate per period = 4.4% per year / 4 (quarterly compounding) = 1.1% per quarter
n = Number of periods (quarters) to reach the goal (what we need to find)
Plugging in the values, we have:
$100,000 = $1,500 * [(1 + 0.011)^n - 1] / 0.011
Simplifying the equation, we have:
[(1 + 0.011)^n - 1] = $100,000 * 0.011 / $1,500
[(1.011)^n - 1] = 0.073333...
Now, we can solve this equation for n using logarithms:
n = log(0.073333...) / log(1.011)
Using a financial calculator or an online calculator, we find that n ≈ 92.33 quarters.
Since Naomi is making quarterly payments, we round up to the next whole number, giving us a total of 93 quarters.
Therefore, it will take Naomi approximately 93 quarters (or around 23 years and 3 months) to reach her goal of $100,000.
Doubling her payment amount to $3,000 per quarter would indeed save her time in reaching her goal. The higher payment amount means she would accumulate the desired amount faster. However, to determine the exact time saved, we would need to recalculate using the same formula as above with P = $3,000. The time saved will depend on the specific calculation result.
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A given city is at 35°S and 200°W. How far is it from this city to A. the North Pole and B. the Equator C. the south pole
The distance from the given city to the South Pole is 125 degrees of latitude.
To determine the distance from the given city to various locations, we need to consider the latitude and longitude coordinates.
Distance to the North Pole:
The North Pole is located at 90°N latitude. Since the given city is at 35°S latitude, we need to calculate the difference in latitude between the city and the North Pole.
Distance to the North Pole = 90° - 35° = 55°
The distance from the given city to the North Pole is 55 degrees of latitude.
Distance to the Equator:
The Equator is located at 0° latitude. To determine the distance from the city to the Equator, we need to calculate the absolute value of the latitude of the city.
Distance to the Equator = |35°| = 35°
The distance from the given city to the Equator is 35 degrees of latitude.
Distance to the South Pole:
The South Pole is located at 90°S latitude. Since the given city is at 35°S latitude, we need to calculate the difference in latitude between the city and the South Pole.
Distance to the South Pole = 35° - (-90°) = 35° + 90° = 125°
The distance from the given city to the South Pole is 125 degrees of latitude.
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I WILL GIVE BRAINLIEST
Step-by-step explanation:
In a randomized block design blocked by gender, treatments should be assigned randomly within each gender block. The correct assignment maintains a distribution of one treatment for each gender. Looking at the given options, only one meets this criterion:
OA: (1f, 2f), B: (1m, 2m). C: (3f, 3m). D: (4f, 4m)
Each treatment group A, B, C, and D contains one male and one female, making the distribution of treatments blocked by gender.
There are 10 balls with different sizes. You take 4 random balls out of the 10 balls each time and then put them back. What is the probability that you will take the smallest ball at least once during 4 tries?
The probability of taking the smallest ball at least once during 4 tries can be calculated as 1 minus the probability of not taking the smallest ball in any of the 4 tries. Since each try is independent and the probability of not taking the smallest ball in a single try is 9/10, the probability of not taking it in all 4 tries is (9/10) * (9/10) * (9/10) * (9/10) = 0.6561. Therefore, the probability of taking the smallest ball at least once during 4 tries is 1 - 0.6561 = 0.3439, or approximately 34.39%.
To find the probability of not taking the smallest ball in any of the 4 tries, we need to calculate the probability of not selecting the smallest ball in each try and then multiply them together.
In each try, there are 9 balls remaining that are not the smallest ball, out of a total of 10 balls. Therefore, the probability of not taking the smallest ball in a single try is 9/10.
Since the tries are independent events, we can multiply the probabilities together to find the probability of not taking the smallest ball in all 4 tries.
After calculating this probability, we subtract it from 1 to obtain the probability of taking the smallest ball at least once during the 4 tries.
In this case, the probability of not taking the smallest ball in all 4 tries is (9/10) * (9/10) * (9/10) * (9/10) = 0.6561.
Finally, subtracting this value from 1 gives us the probability of taking the smallest ball at least once, which is 1 - 0.6561 = 0.3439, or approximately 34.39%.
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PLSPLSS PLSSMSL HELP ME
Answer:
1. x = 18
2. x = 31
Step-by-step explanation:
1. Angles in a quadrilateral sum to 360°.
360 -(60 +130 +70) = 360 -260 = 100
So, x +82 = 100. x = 100 -82 = 18
2. Angles in a triangle sum to 180°. 180 -(29 +75) = 180 -104 = 76.
So, -17 +3x = 76. 3x = 93. x = 93/3 = 31
what comes next in the sequence
7,10,19,34
Based on the pattern we identified, the next term in the sequence would be 55.
The sequence should be 7, 10, 19, 34, 55
To identify the pattern and determine what comes next in the given sequence (7, 10, 19, 34), we need to examine the relationship between the terms and look for a consistent pattern.
If we calculate the differences between consecutive terms, we get:
10 - 7 = 3
19 - 10 = 9
34 - 19 = 15
By examining the differences, we notice that they are increasing by 6 each time.
This suggests that the sequence might be formed by adding an increasing number to each term.
Let's calculate the next difference:
15 + 6 = 21
Now, let's add this difference to the last term of the sequence:
34 + 21 = 55
Therefore, based on the pattern we identified, the next term in the sequence would be 55.
To summarize:
7, 10, 19, 34, 55
It's important to note that without further context or information, this pattern is just one of the possibilities and may not be the only correct answer.
Additional terms or a different pattern may emerge if more information is provided.
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I need help with 36 please I don’t understand
Answer:
36)
[tex]f(x) = \frac{1}{x + 3} - 1[/tex]
The equation of the function is y = 1/(x + 3) - 1
How to determine the equation of the transformationFrom the question, we have the following parameters that can be used in our computation:
The reciprocal function shifted down one unit and left three units
The equation of the reciprocal function is represented as
y = 1/x
When shifted down one unit, we have
y = (1/x) - 1
When shifted left three units, we have
y = 1/(x + 3) - 1
Hence, the equation of the function is y = 1/(x + 3) - 1
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What is the distance between the points (1,3)
and (–2,7)?
=================================================
Explanation
I'll use the distance formula.
[tex](x_1,y_1) = (1,3) \text{ and } (x_2, y_2) = (-2,7)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(1-(-2))^2 + (3-7)^2}\\\\d = \sqrt{(1+2)^2 + (3-7)^2}\\\\d = \sqrt{(3)^2 + (-4)^2}\\\\d = \sqrt{9 + 16}\\\\d = \sqrt{25}\\\\d = 5\\\\[/tex]
The distance is 5 units.
Answer:
5
Step-by-step explanation:
Question 4(Multiple Choice Worth 5 points)
(01.02 MC)
A manufacturing firm employs workers to monitor and maintain specialized machines making small metal parts. Which economic questions does this statement
answer?
O How much to produce? How much to charge?
How to produce? How much to produce?
Owhat to produce? For whom to produce?
Owhat to produce? How to produce?
The correct answer is: O How to produce? How much to produce?
The statement "A manufacturing firm employs workers to monitor and maintain specialized machines making small metal parts" answers the economic questions of "How to produce?" and "How much to produce?"
How to produce: The statement indicates that the manufacturing firm has chosen to employ workers to monitor and maintain specialized machines. This suggests that they have made a decision regarding the production process and how they will go about manufacturing the small metal parts.
How much to produce: The fact that the manufacturing firm has employed workers to monitor and maintain the machines implies that they have determined a level of production that is deemed appropriate or necessary. The number of workers and the capacity of the machines can influence the quantity of small metal parts produced.
Therefore, the correct answer is: O How to produce? How much to produce?
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Rearrange the equation so u is the independent variable
-12u+13=8w-3
w=_______
the answer is
w = -3/2 u + 2
Suppose you have entered a 48-mile biathlon that consists of a run and a bicycle race. During your run, your average
velocity is 5 miles per hour, and during your bicycle race, your average velocity is 23 miles per hour. You finish the race
in 6 hours. What is the distance of the run? What is the distance of the bicycle race?
The distance of the run is miles.
The distance of the bicycle race is approximately 24.61 miles.
Let's assume the distance of the run is 'x' miles and the distance of the bicycle race is 'y' miles.
We know that average velocity is equal to the total distance divided by the total time taken.
We can use this information to form two equations based on the given average velocities and total time.
For the run:
Average velocity = Distance of the run / Time taken for the run
5 mph = x miles / T hours ---(Equation 1)
For the bicycle race:
Average velocity = Distance of the bicycle race / Time taken for the bicycle race
23 mph = y miles / (6 - T) hours ---(Equation 2)
Since the total time for the race is 6 hours, we can substitute (6 - T) for the time taken during the bicycle race.
Now, we can solve these equations simultaneously to find the values of 'x' and 'y'.
From Equation 1, we have:
5T = x
From Equation 2, we have:
23(6 - T) = y
Now, we substitute the value of 'x' in terms of 'T' from Equation 1 into Equation 2:
23(6 - T) = 5T
138 - 23T = 5T
138 = 28T
T = 138 / 28
T ≈ 4.93 hours
Substituting this value back into Equation 1, we can find 'x':
5(4.93) = x
x ≈ 24.65 miles
Therefore, the distance of the run is approximately 24.65 miles.
To find the distance of the bicycle race, we substitute the value of 'T' back into Equation 2:
23(6 - 4.93) = y
23(1.07) = y
y ≈ 24.61 miles
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Please answer ASAP I will brainlist
Answer:
f(0) = 1
f(1) = 21.1
Step-by-step explanation:
Do as the problem says:
[tex]f(0)=4^{2.2(0)}=4^0=1\\f(1)=4^{2.2(1)}=4^{2.2}\approx21.1[/tex]
Determine the surface area and volume
Answer:
Volume : 300
Surface Area : 280
Step-by-step explanation:
Volume : 6*5*10
Surface Area : 50+50+30+30+60+60
When parallel lines are intersected by a transversal, which of the following angle pairs are supplementary?
Answer:
if two parallel lines are cut by a transversal,then, exterior angles on the same side of the transversal are supplementary!
Step-by-step explanation:
I don't really know how to explain it but I hope this helped!
A total of 27 students are in your class. There are nine more males than females.
How many females are in your class?
4x+y20
find the value of y when x =6
Answer:
y= -4
Step-by-step explanation:
To find the value of y when x = 6, we can substitute x = 6 into the equation and solve for y:
4(6) + y = 20
24 + y = 20
y = 20 - 24
y = -4
Therefore, when x = 6, y is equal to -4.
This example using cluster sampling, how do we know whether these estimates are considered valid?
The estimates are not correct because we are to find the proportion and sample error of the given values. The proportion expresses the number of opposing votes to the total number of voters. Also, the sampling error follows the formula of [tex]SE = Z\sqrt{P(1 - P/n)}[/tex]
The right estimate to use
The exact formula used in the expression is quite different from the standard formula for calculating the standard error. We are supposed to find the root of the standard deviation but that is not the case as can be seen in the formula above.
So, the main issue with this formula is that the square root is not considered in the proportion formula used by the council, so it is not a valid estimate.
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What is the solution to the equation below In X=3.1
Answer:
the solution would be X=3 as 3.1 represents 3×1.
Lola has 37 in Saint in her pocket. Then she finds these coins in the couch
Answer:
?
Step-by-step explanation:
?
Michael has $15 and wants to buy a combination of cupcakes and fudge to feed at least three siblings. A cupcake costs $2, and a piece of fudge costs $3
This system of inequalities models the scenario:
2x + 3y <15
x+y≥ 3
Part A: Describe the graph of the system of inequalities, including shading and the types of lines graphed. Provide a description of the solution set. (4 points)
Part B: Is the point (5, 1) included in the solution area for the system? Justify your answer mathematically. (3 points)
Part C: Choose a different point in the solution set and interpret what it means in terms of the real-world context. (3 points).
***PLEASE MAKE IT EASY FOR ME SO ITS EASY TO TYPE*** 15 POINTS
Step-by-step explanation:
Part A: The graph of the system of inequalities consists of two lines and a shaded region.
The line 2x + 3y = 15 is a solid line (because of the "less than" symbol in the inequality) and is graphed using a straight line connecting two points. For example, when x = 0, y = 5, and when x = 7.5, y = 0.
The line x + y = 3 is a solid line (because of the "greater than or equal to" symbol in the inequality) and is graphed using a straight line connecting two points. For example, when x = 0, y = 3, and when x = 3, y = 0.
The shaded region represents the solution set. It is the area below the line 2x + 3y = 15 and above or on the line x + y = 3. This shaded region satisfies both inequalities simultaneously.
Part B: To determine if the point (5, 1) is included in the solution area, we substitute x = 5 and y = 1 into both inequalities:
2x + 3y < 15:
2(5) + 3(1) < 15
10 + 3 < 15
13 < 15
Since 13 is less than 15, the point (5, 1) satisfies the first inequality.
x + y ≥ 3:
5 + 1 ≥ 3
6 ≥ 3
Since 6 is greater than or equal to 3, the point (5, 1) satisfies the second inequality.
Since the point (5, 1) satisfies both inequalities, it is included in the solution area for the system.
Part C: Let's choose the point (2, 2) as another example from the solution set.
Interpretation in real-world context:
When we have x = 2 and y = 2, it means Michael decides to buy 2 cupcakes and 2 pieces of fudge. This combination of sweets satisfies the conditions set in the inequalities, ensuring that he can feed at least three siblings.
The point (2, 2) represents a valid solution in which Michael spends a total of $10 (2 cupcakes * $2/cupcake + 2 fudges * $3/fudge = $4 + $6 = $10). With this choice, he can afford to buy enough treats to feed his three siblings while staying within his budget of $15.
Two roll of electric wire contain 80m 20cm and 86m 56cm of wire respectively. what is the total length of electric wire of both the roll? Express the Result in metres
The total length of electric wire in both rolls is 166.76 meters.
To find the total length of electric wire in both rolls, we need to add the lengths of the two rolls together.
The first roll contains 80m 20cm of wire. We can convert this to meters by noting that 1 meter is equal to 100 centimeters. Therefore, the length of the first roll is:
80m 20cm = 80 meters + (20 centimeters / 100) meters
= 80 meters + 0.20 meters
= 80.20 meters
Similarly, the second roll contains 86m 56cm of wire. Converting this to meters:
86m 56cm = 86 meters + (56 centimeters / 100) meters
= 86 meters + 0.56 meters
= 86.56 meters
To find the total length, we add the lengths of both rolls:
Total length = 80.20 meters + 86.56 meters
= 166.76 meters
Therefore, the total length of electric wire in both rolls is 166.76 meters.
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which f(x) function is this?
Answer:
[tex]f(x) = - 3 {x}^{2} - 6x - 1[/tex]
You pick a card at random.
2 3 4 5
What is P(divisor of 32)?
which of the following will form the composite function G(F(x)) shown below G(F(x)) = 4√x