The estimate of the number of gallons of oil in the tank at t = 14 hours is 100.8 gallons. The correct answer is option C.
To estimate the number of gallons of oil in the tank at t = 14 hours using a trapezoidal approximation,
we need to calculate the total change in oil volume over the given time period.
The trapezoidal approximation involves dividing the time interval into subintervals and approximating the change in volume as the sum of trapezoidal areas.
Let's calculate the approximate volume of oil at t = 14 hours using the given data and the trapezoidal approximation: Interval 1 (2 to 5 hours):
Average rate = (R(2) + R(5)) / 2 = (8.2 + 7.8) / 2 = 16 / 2 = 8 gallons per hour.
Volume change =
[tex]Average rate \times time = 8 \times (5 - 2)[/tex]
= 24 gallons.
Interval 2 (5 to 10 hours):
Average rate = (R(5) + R(10)) / 2 = (7.8 + 8.6) / 2 = 16.4 / 2 = 8.2 gallons per hour
Volume change =
[tex]Average rate \times time = 8.2 \times (10 - 5) [/tex]
= 41 gallons
Interval 3 (10 to 14 hours):
Average rate = (R(10) + R(14)) / 2 = (8.6 + 9.3) / 2 = 17.9 / 2 = 8.95 gallons per hour
Volume change =
[tex]Average rate \times time = 8.95 \times (14 - 10)[/tex]
= 35.8 gallons.
Total volume change = Interval 1 + Interval 2 + Interval 3 = 24 + 41 + 35.8 = 100.8 gallons.
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Solve 2x2 + x − 4 = 0
Answer:
x = 0
Step-by-step explanation:
hi there!
im not sure if the x between the 2's is a x as in a variable or if it is multiplication sign. im going to solve the problem as if it is a multiplication sign but if that is wrong then please let me know!
2 * 2 + x - 4 = 0
is our equation that we are working with ^
first step is, following the pemdas we multiply *2 with its self
( ^ parentheses, exponents, multiplication/ division making sure to solve it left to right, addition and subtraction still making sure to follow the left to right rule )
2 * 2 + x - 4 = 0
2 * 2
= 4 + x - 4 + 0
then we add positive 4 and negative 4 together, canceling eachother out the giving us the answer of x = 0
4 + x - 4 + 0
4 + - 4 = 0
x = 0
i hope this helps you! have a good rest of your day :)
A school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Use Sheet 3 of the Excel file to create a histogram, and calculate x¯, the t-statistic, and the p-value.
From the histogram, can normality be assumed?
x¯=
t=
p=
Since the p-value is
evidence exists that the mean GPA is greater than 2.75.
than the significance level 0.05, the null hypothesis
.
Pick Yes No
Pick greater less
Pick fails to be rejected is rejected
3.09
2.73
2.58
2.68
2.84
2.68
2.64
2.62
2.35
2.72
2.63
2.77
2.72
3.03
2.71
2.96
2.74
3.01
2.88
2.68
2.83
3.02
2.83
2.71
2.67
2.79
2.65
2.56
2.78
2.89
2.40
2.38
2.41
2.83
2.86
3.01
2.80
2.84
2.95
2.75
2.93
2.48
2.34
2.97
2.85
2.74
2.84
3.10
2.62
2.77
The mean GPA is greater than 2.75.
Here, we have,
A= 4.0, A- = 3.7, B+ = 3.
three, and many others.
Total the first-class factors, and overall the credit hours. Divide the overall satisfactory points by means of the overall credit score hours.
Grade Point Average (GPA):
Grade point average (GPA) is the measure used to summarize your instructional fulfillment at Griffith. After the e-book of final grades every trimester, your software and career.
GPA is calculated and could be utilized by the college to tell choices, which include the subsequent: educational progression.
Divide the total range of grade factors earned with the aid of the total number of letter-graded units undertaken.
Mean GPA = total / 50
= 2.75.
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According to the latest real estate report from a suburban town, the mean number of home purchases during last quarter was 175 homes with a population standard deviation of 6 homes. A real estate agent believes that the recent increase of mortgage interest rates is causing a decline in home purchases. To test this, the real estate agent randomly selects 60 recent home purchases. What is the probability that the mean of this sample of home purchases is between 173 and 174 homes
Answer:
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(173≤X≤174) = 0.0936
Step-by-step explanation:
Step(i):-
Given that the mean of the Population = 175
Given that the standard deviation of the Population = 6
Let 'x⁻' be the mean of the random sample
Given that x₁⁻ = 173
[tex]Z_{1} = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{173-175}{\frac{6}{\sqrt{60} } } =-2.58[/tex]
Given that x₂⁻ = 174
[tex]Z_{2} = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{174-175}{\frac{6}{\sqrt{60} } } = -1.29[/tex]
Step(ii):-
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(X₁≤X≤X₂) = P(Z₁≤Z≤Z₂)
= P(Z≤Z₂) - P(Z≤Z₂) ( both values 'Z' values are negative)
= 0.5 -A(Z₁) - (0.5 -A(Z₂))
= |A(Z₂) -A(Z₁)|
P(173≤X≤174) = | A(2.58)-A(1.29)|
= 0.4951 - 0.4015 (∵ from normal table)
= 0.0936
Final answer:-
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(173≤X≤174) = 0.0936
What is the equation of the line that passes through the point (-6, -8) and has a slope of 1/3
Answer:
x^2 = (28)^2 + (45)^2
= 784 + 2025
= 2809
x = 53
The equation of the line is y = (1/3)x - 6.
What is an equation of a line?The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
Example:
The slope of the line y = 2x + 3 is 2.
The slope of a line that passes through (1, 2) and (2, 3) is 1.
We have,
The equation of a line is y = mx + c.
Now,
m = 1/3
And,
(-6, -8) = (x, y)
So,
y = mx + c
-8 = 1/3 x -6 + c
-8 = -2 + c
-8 + 2 = c
c = -6
Now,
y = mx + c
y = (1/3)x - 6
Thus,
The equation of the line is y = (1/3)x - 6.
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Let X=Zthe set of inters and Int.A be the set of all singletons of X tben A)- LA PIX) d) None of the shove d b a c
Since option b correctly represents the set LA as the set of all singletons of X, and the other options are incorrect, the correct answer is option d.
Let's break down the given options:
a) LA = {∅}:
This option represents the set LA, which is the set of all singletons of X. A singleton is a set that contains only one element. Since X is the set of integers, a singleton of X would be a set containing a single integer. However, the notation LA suggests that the singletons are related to the set A, not X. Therefore, option a is not correct.
b) LA = {{a} | a ∈ X}:
This option represents the set LA, which is the set of all singletons of X. Here, the notation {{a} | a ∈ X} denotes the set of all sets that contain a single element, where that element belongs to X. In other words, LA is the set of all possible singletons of X. This option correctly represents the set LA, so option b is correct.
c) LA = {∅, {X}}:
This option represents the set LA as a set containing two elements: the empty set (∅) and the set {X}. However, this representation does not align with the definition of LA as the set of singletons of X. The set LA should only contain sets with a single element, not the empty set or the set {X}. Therefore, option c is not correct.
d) None of the above:
Since option b correctly represents the set LA as the set of all singletons of X, and the other options are incorrect, the correct answer is option d.
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Show that the polynomial p(x) = x² +1 € Z3 [x] is irreducible. Let a be a zero of this polynomial and consider the extension Z3(a) = {0, 1, 2, a, 1+a, 2+a, 2a, 1+ 2a, 2 + 2a} = Z3 [x]/(p(x)) Write out the addition and multiplication tables for this field. What is the multiplicative inverse of 2a + 2?
The multiplicative inverse of 2a + 2 is 2a + 1.
To show that the polynomial p(x) = x² + 1 ∈ Z3[x] is irreducible, we can examine its factors. Since Z3 is a field with three elements {0, 1, 2}, we can substitute each value into p(x) to check for roots. However, none of the elements satisfy p(x) = 0. Therefore, p(x) has no linear factors.
Next, we consider the extension Z3(a) = {0, 1, 2, a, 1+a, 2+a, 2a, 1+2a, 2+2a} = Z3[x]/(p(x)), where a is a zero of p(x). In this field, we can perform addition and multiplication modulo 3.
Addition table:
+ | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
-----------------------------------------------------
0 | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
1 | 1 2 a 1+a 2+a 2a 1+2a 2+2a 0
2 | 2 a 1+a 2+a 2a 1+2a 2+2a 0 1
a | a 1+a 2+a 2a 1+2a 2+2a 0 1 2
1+a | 1+a 2+a 2a 1+2a 2+2a 0 1 2 a
2+a | 2+a 2a 1+2a 2+2a 0 1 2 a 1+a
2a | 2a 1+2a 2+2a 0 1 2 a 1+a 2+a
1+2a | 1+2a 2+2a 0 1 2 a 1+a 2+a 2a
2+2a | 2+2a 0 1 2 a 1+a 2+a 2a 1+2a
Multiplication table:
* | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
-----------------------------------------------------
0 | 0 0 0 0 0 0 0 0 0
1 | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
2 | 0 2 1 2a 1+2a 2+2a a 2+a 1+a
a | 0 a 2a 1+2a 2+a 1+a 2+2a 2 1
1+a | 0 1+a 1+2a 2+a 2 a 1 2+2a 2a
2+a | 0 2+a 2+2a 1+a a 2 1+2a 1 2a
2a | 0 2a a 2+2a 1 1+2a 2 2+a 1+a
1+2a | 0 1+2a 2+a 2 2+2a 1 2a a 1+a
2+2a | 0 2+2a 1+a 1 2a 2 1+a 1+2a a
To find the multiplicative inverse of 2a + 2, we search for an element in the multiplication table that, when multiplied by 2a + 2, results in 1. In this case, the multiplicative inverse is 2a + 1.
Note: The addition and multiplication tables are constructed by performing arithmetic modulo 3 in the field Z3(a) using the given elements.
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A pencil holder in the shape of a cylinder has the dimensions shown in the diagram 20. Which of the following is the closest to the volume of the cylinder, in cubio H 907 cm F 209 cm G 3,627 cm 4,773 cm
Answer:
my best guess would be H
Step-by-step explanation:
I hope this helped and if you have more details that could help me get to a more appropriate answer pls comment them and I'll do my best to help but like I said with what you provided my best guess would be H
One boss decided to increase the salary of an employee by 5%. How much will he get if his salary was $2000?
Answer:
$2100 will be his new salary
Step-by-step explanation:
Well since a 5 percent raise is basically 105% of his pay, we can multiply 105% with 2000
since its a percent in decimal form its 1.05
1.05*2000=2100
$2100 is his new salary
The ratio of cement to gravel in a road
surface is 3:17. Find the percent
of cement in the mixture.
Sally had some marbles. After buying 12 more marbles, she had 25 marbles. How many marbles did Sally have before she bought more?
Answer:
13
Step-by-step explanation:
25 - 12 = 13
Answer:
13
Step-by-step explanation:
12 + 13 = 25 or 25 -12 = 13
jada walks at a speed of 3mph. elena walks at a speed of 2.8 mph. if they both begin walkign along a walking trail at the same time, how much father will jada walk adter 3 hours
Given, Jada walks at a speed of 3 mph and Elena walks at a speed of 2.8 mph.Both Jada and Elena start walking along a walking trail at the same time.
Let us determine the distance covered by both of them.Distance travelled by Jada in 3 hours is:Distance = Speed × Time= 3 mph × 3 hours= 9 miles Distance travelled by Elena in 3 hours is:Distance = Speed × Time= 2.8 mph × 3 hours= 8.4 miles Thus, Jada will walk 0.6 miles farther than Elena after 3 hours.
To determine how far Jada will walk after 3 hours, we need to calculate the distance traveled based on her speed.
Jada walks at a speed of 3 miles per hour (mph), so we can calculate her distance using the formula:
Distance = Speed × Time
Plugging in the values, we have:
Distance = 3 mph × 3 hours
Distance = 9 miles
Therefore, Jada will walk a distance of 9 miles after 3 hours.
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The given information is as follows:
Jada walks at a speed of 3 mph and Elena walks at a speed of 2.8 mph. If they both begin walking along a walking trail at the same time.
Therefore, Jada will walk 9 miles after 3 hours.
The distance covered by Jada after 3 hours can be calculated as follows:
Distance = Speed x Time
Since Jada walks at a speed of 3 mph, the distance covered by her in 3 hours can be calculated as:
Distance covered by Jada = 3 mph x 3 hours
= 9 miles.
Therefore, Jada will walk 9 miles after 3 hours.
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Need some help with Algebra!
Today's my last day to get missing work in and I currently have an F in Math and I'm just trying to get it up so I don't fail. Help me out? Heres the picture:
The system represented by the graph is y ≤ 1/2x + 3 and y < -2x + 8
The point (4, 0) is not a solution to the system
Constructing the system represented by the graphFrom the question, we have the following parameters that can be used in our computation:
The graph
On the graph there are two inequalities and they are calculated as follows:
A linear equation is represented as
y = mx + c
Where
c = y when x = 0
So, we have
y = mx + 3
y = mx + 8
Using the points on the graphs, we have
y = mx + 3 ⇒ -6m + 3 = 0 ⇒ m = 1/2
y = mx + 8 ⇒ 4m + 8 = 0 ⇒ m = -2
So, we have
y = 1/2x + 3
y = -2x + 8
Represent as inequalities
y ≤ 1/2x + 3
y < -2x + 8
Is (4, 0) a solution to the systemFrom the graph the point (4, 0) is out of the shaded region
This means that the point (4, 0) is not a solution to the system
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Help I’m being timed!
Rachel bought $517 worth of clothes 12% off. What is her total? Show work.
Answer:
454.96
Step-by-step explanation:
Suppose that the total price of worth clothes equal : x
Rachel bought them with 12% off which means , Rachel bought them :
( x ) - ( 12x / 100 )
As the question told the above equation must equal 517$ , So :
( 100x / 100 ) - ( 12x / 100 ) = 517
100x - 12x / 100 = 517
88x / 100 = 517
multiply sides by 100
88x = 51700
Divide sides by 88
x = 587.5 $
Thus the total price is 587.5 $ .
- 2. Find the inverse of the matrix (AAB)-, where A and B are invertible n x n matrices. Confirm you found the inverse by showing that (Your inverse matrix) - (AAB)-' = 1 and (AAB)-. (Your inverse mat
The inverse of the matrix (AAB)- can be found by taking the inverse of A, the inverse of B, and the inverse of AAB.
How to find the inverse of the matrix (AAB)- by using the inverses of A and B?To find the inverse of the matrix (AAB)-, we can utilize the properties of matrix inverses.
Given that A and B are invertible n x n matrices, we can express the inverse of (AAB)- as the product of the inverses of A, B, and AAB in the reverse order.
In mathematical notation, the inverse of (AAB)- can be represented as (AAB)-1 = B-1A-1(AAB)-1.
To confirm that the obtained inverse is correct, we can evaluate the expression (AAB)-1(AAB)- and verify that it equals the identity matrix.
Similarly, we can multiply (AAB)- with (AAB)-1 and check if it results in the identity matrix.
By performing these calculations and observing that the resulting product is indeed the identity matrix, we can confirm the correctness of the inverse.
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What is the value of -92 – 10+ + + 2(145 – 7)?
не
d
ard
Answer:
-92 - 10 + 2(145 - 7) + 174
Step-by-step explanation:
Clarissa has a budget of $1,200 a month to spend for rent and food. She has already spent $928 this month. Which inequality represents the amount she can still spend this month and remain within her budget?
plz plz
Let c(t) be a solution to the system of differential equations: xz(t) *) z'() -52x:(t) + 22x2(t) - 110 x1(t) + 4722(t) -3 Ifr(0) [:) ] find a(t). -3 Put the eigenvalues in ascending order when you enter 31(t), xa(t) below. r(t) = exp( t)+ exp( t) 22(t) exp( t)+ exp( t)
The solution to the system of differential equations with the given initial condition is:
x₁(t) = (-6/17) × exp(-t) + (44/17) × exp(2t)
x₂(t) = (-15/17) × exp(-t) + (108/17) × exp(2t)
The system of differential equations
x₁'(t) = -52x₁(t) + 22x₂(t)
x₂'(t) = -110x₁(t) + 47x₂(t)
Let's find the solution X(t) = [x₁(t), x(t)] with the initial condition x₀ = [-3, -3].
To solve the system, we'll start by finding the eigenvalues and eigenvectors of the coefficient matrix.
The coefficient matrix of the system is
A = [[-52, 22], [-110, 47]]
To find the eigenvalues, we solve the characteristic equation det(A - λI) = 0, where I is the identity matrix
| -52 - λ 22 |
| -110 47 - λ | = 0
Expanding the determinant, we have
(-52 - λ)(47 - λ) - (-110)(22) = 0
Simplifying, we get
(λ + 1)(λ - 2) = 0
Solving this quadratic equation, we find two eigenvalues
λ₁ = -1
λ₂ = 2
Now let's find the corresponding eigenvectors for each eigenvalue.
For λ₁ = -1, we solve the equation (A - λ₁I)v = 0
| -51 22 | | v₁ | | 0 |
| -110 48 | | v₂ | = | 0 |
Simplifying, we get the equation
-51v₁ + 22v₂ = 0
-110v₁ + 48v₂ = 0
Solving this system of equations, we find the eigenvector v₁ = [2, 5].
For λ₂ = 2, we solve the equation (A - λ₂I)v = 0
| -54 22 | | v₁ | | 0 |
| -110 45 | | v₂ | = | 0 |
Simplifying, we get the equation
-54v₁ + 22v₂ = 0
-110v₁ + 45v₂ = 0
Solving this system of equations, we find the eigenvector v₂ = [11, 27].
Therefore, the eigenvalues in ascending order are
λ₁ = -1
λ₂ = 2
The corresponding eigenvectors are
v₁ = [2, 5]
v₂ = [11, 27]
To find the solution X(t), we can write it as a linear combination of the eigenvectors:
X(t) = c₁ × v₁ × exp(λ₁ × t) + c₂ × v₂ × exp(λ₂ × t)
Substituting the given values for x₁(t) and x₂(t) into the equation, we can find the coefficients c₁ and c₂:
x₁(t) = c₁ × 2 × exp(-t) + c₂ × 11 × exp(2t)
x₂(t) = c₁ × 5 × exp(-t) + c₂ × 27 × exp(2t)
Using the initial condition x₀ = [-3, -3], we can solve for c₁ and c₂
-3 = c₁ × 2 × exp(0) + c₂ × 11 × exp(0)
-3 = c₁ × 5 × exp(0) + c₂ × 27 × exp(0)
Simplifying, we get:
-3 = 2c₁ + 11c₂
-3 = 5c₁ + 27c₂
Solving this system of equations, we find
c₁ = -3/17
c₂ = 4/17
Substituting these values back into the solution equation, we have
x₁(t) = (-3/17) × 2 × exp(-t) + (4/17) × 11 × exp(2t)
x₂(t) = (-3/17) × 5 × exp(-t) + (4/17) × 27 × exp(2t)
Therefore, the solution to the system of differential equations with the given initial condition is:
x₁(t) = (-6/17) × exp(-t) + (44/17) × exp(2t)
x₂(t) = (-15/17) × exp(-t) + (108/17) × exp(2t)
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The question is incomplete the complete question is :
Need your help answer correctly for 20 points! <3
12.50 dollars per hour
Answer:
$12.50
Step-by-step explanation:
Hi,
Cassie: 250 / 20 = 12.5
Marli: 312.50 / 25 = 12.5
Brad: 350 / 28 = 12.5
Each worker makes $12.50 per hour.
I hope this helps :)
In ΔMNO, the measure of ∠O=90°, the measure of ∠M=13°, and OM = 9.6 feet. Find the length of MN to the nearest tenth of a foot.
Answer: the answer is 9.9
Step-by-step explanation:
Plz help!! Dont answer if you cant help
Answer:
94.88 cubic units
Step-by-step explanation:
Volume of the prism = Area of base * Height
[tex] = 5( \frac{1}{2} \times 2.75 \times 4) \times 3.45 \\ \\ = 5 \times 2.75 \times 2 \times 3.45 \\ \\ = 10\times 2.75 \times 3.45 \\ \\ = 94.875 \\ \\ \approx 94.88 \: cubic \: units[/tex]
WILL GIVE BRAINLIST FOR THE RIGHT ANSWER
plz explain how he got it wrong
Answer: A. Bruno accidentally used the diameter instead of the radius to find the area of the base. B. The correct volume is 602.88
Step-by-step explanation: Area of a cylinder is (r^2)(pi)(h) not (d^2)(pi)(h)
sketch a graph of f(t), express the function f(t) in terms of the heaviside function u(t −a), and find the laplace transform l{f(t)}.
(a) f(t) = {sint 0 ≤ t < π {0 π ≤ t
(b) f(t) = {0 0 ≤ t <3
{t² 3 ≤ t
(a) To sketch the graph of f(t) = {sin(t) 0 ≤ t < π, 0 π ≤ t}, we can observe that the function is equal to zero for t greater than or equal to π. Thus, the graph of f(t) consists of a sine wave from 0 to π, and then it becomes zero from π onwards.
(b) To express f(t) in terms of the Heaviside function u(t - a), we can write f(t) as {0 0 ≤ t < 3, t² 3 ≤ t}. This means that for t less than 3, the function is zero, and for t greater than or equal to 3, the function is t squared. We can rewrite this using the Heaviside function as f(t) = t²u(t - 3).
To find the Laplace transform L{f(t)}, we can apply the Laplace transform to each part of the function separately. Using the Laplace transform properties, we have L{f(t)} = L{t²u(t - 3)}. By applying the time-shifting property, the Laplace transform of t²u(t - 3) is given by L{t²u(t - 3)} = e^(3s)/s^3, where s represents the Laplace variable.
The graph of f(t) consists of a sine wave from 0 to π, and then it becomes zero from π onwards. The function f(t) can be expressed as f(t) = t²u(t - 3) using the Heaviside function. The Laplace transform of f(t) is L{f(t)} = e^(3s)/s^3.
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11) Krystal and Rob each improved their yards by planting hostas and ivy. They bought their
supplies from the same store. Krystal spent $132 on 8 hostas and 4 pots of ivy. Rob spent $44
on 2 hostas and 2 pots of ivy. What is the cost of one hosta and the cost of one pot of ivy?
Answer: Cost of one hosta = $11
Cost of one pot of ivy = $11
Step-by-step explanation:
Let the the cost of one hosta be represented by x.
Let the cost of one pot of ivy be represented by y.
The information given in the question can be formed into an equation as:
8x + 4y = 132 ............ i
2x + 2y = 44 ............. ii
Multiply equation i by 2
Multiply equation ii by 4
16x + 8y = 264 ........ iii
8x + 8y = 176 ........ iv
Subtract iv from iii
8x = 88
x = 88/8
x = 11
One hosta cost $11
From equation ii
2x + 2y = 44
2(11) + 2y = 44
22 + 2y = 44
2y = 44 - 22
2y = 22
y = 22/2
y = 11
One pot of ivy cost $11
Please help me with the questions Please please please ASAP ASAP please ASAP help please please ASAP please please help ASAP ASAP please please help please please ASAP please please help ASAP ASAP please please help please please ASAP please
Answer:
9
Step-by-step explanation:
8/12=6/x
cross multiply to get 9
Can somebody please help a brother out?:))
PLZ HELP round to the nearest cent!!
Answer:
$85.09
Step-by-step explanation:
To rent a certain meeting room, a college charges a reservation fee of $18 and an additional fee $5 of per hour. The chemistry club wants to spend at most %58 on renting the room. What are the possible numbers of hours the chemistry club could rent the meeting room? Use t for the number of hours. Write your answer as an inequality solved for t.
Answer:
You need the minimum cost for renting the meeting room given the following info
Reservation Fee = $18
Hourly Rate = $5
The renter wants to keep the cost below $58
So the cost will vary with the time, t you use the inequality below
5t + 18 ≤ 58
You can solve this to get that minimum
You can check you answer by graphing it.
I hope this helps!<3
Kwans beginning account balance was $20. his ending balance is $0. what integer represents the change in his account balance from beginning to end?
(3) Of 88 adults randomly selected from one town, 69 have health insurance.
(Q) Find the minimum sample size to obtain a margin of error of 0.04 236
The minimum sample size required is 94 to obtain a margin of error of 0.04236.
To find the minimum sample size required to obtain a margin of error of 0.04236.
we need to use the formula for sample size determination for proportions:
n = (Z² × p × (1 - p)) / E²
Where:
n = required sample size
Z = Z-score corresponding to the desired level of confidence (we'll assume a 95% confidence level, so Z ≈ 1.96)
p = estimated proportion (from the available data)
E = margin of error
Given:
Total adults in the town = 88
Adults with health insurance = 69
First, we calculate the estimated proportion (p) of adults with health insurance:
p = (69 / 88)
Next, we substitute the values into the formula and solve for n:
n = (1.96² × (69/88) × (1 - 69/88)) / (0.04236²)
n = 93.966
The minimum sample size required is 94 to obtain a margin of error of 0.04236 (or 4.236%).
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The owner of a tree farm plants pine trees and oak trees in a ratio of 8:3. How many oak trees are planted if 264 pine trees are planted
Answer:
99 oak trees
Step-by-step explanation:
Given data
Ratio= 8:3
Number of pine tree= 264
Let the number of oak trees be x
Let us apply the part to part method
8/264= 3/x
cross multiply
264*3= 8x
792=8x
x= 792/8
x=99 oak trees
The owner of the tree farm planted 99 oak trees.
An equation is an expression used to show the relationship between two or more numbers or variables.
Given that a farmer plants pine trees and oak trees in a ratio of 8:3. If 264 pine trees are planted, let y represent the total number of trees hence:
264 = (8/11) * y
y = 363 trees
Number of oak trees = (3/11) * 363 = 99 trees
Therefore the owner of the tree farm planted 99 oak trees.
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