ANSWER THIS RIGHT NOW PLEASE

ANSWER THIS RIGHT NOW PLEASE

Answers

Answer 1

The perimeter of rectangle A is k times the perimeter of rectangle B. Therefore, option C is the correct answer.

Here, we have,

Given that, rectangle A has a length and width that are k times the length and width of rectangle B.

We have,

The perimeter of a rectangle is the total distance of its outer boundary. It is twice the sum of its length and width and it is calculated with the help of the formula: Perimeter = 2(length + width).

Let the length of a rectangle A is L and the width of a rectangle A is W.

Let the length of a rectangle B is KL and the width of a rectangle A is KW.

Now, Perimeter of a rectangle A

= 2(L+W)

Perimeter of a rectangle B

= 2(KL+KW)

= 2K(L+W)

The perimeter of rectangle A is k times the perimeter of rectangle B. Therefore, option C is the correct answer.

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complete question:

If rectangle A has a length and width that are k times the length and width of rectangle B, which statement is true?

A. the perimeter of rectangle A is 2k times the perimeter of rectangle B.

B. the perimeter of rectangle A is k^2 times the perimeter of rectangle B.

C. the perimeter of rectangle A is k times the perimeter of rectangle B.

D. the perimeter of rectangle A is k^3 times the perimeter of rectangle B.


Related Questions

When ordering ice cream, an ice cream shop is trying to figure out how much ice cream is sold each day. They know the size of the cones and how many cones they sell each day. Should they find the exact volume using pi or should they use 3.14 to estimate? Why?

Answers

Using the exact value of pi is not necessary, the approximate volume of the cones is okay.

Should they find the exact volume using pi or should they use 3.14 to estimate?

The ice cream shop should use 3.14 to estimate the volume of the ice cream cones.

The exact volume of the cones is not necessary for ordering ice cream, as the ice cream shop only needs to know the approximate amount of ice cream that is sold each day.

Using 3.14 to estimate the volume of the cones will give the ice cream shop a good enough estimate for ordering the correct amount of ice cream.

Using the exact value of pi would only be necessary if the ice cream shop needed to know the exact volume of the cones for some other reason, such as for scientific research. In most cases, however, the approximate volume of the cones is okay.

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Tess and Finley are building a triangular block tower. The tower will only be stable of the base forms a 90 degree angle. Their blue block is 4. 3 inches, their orange block is 5. 2 inches and their red block is 6. 1 inches. Will the tower be stable? Yes or no, explain

Answers

The sum of A² and B² (45.53) is not equal to C² (37.21). Therefore, the blocks cannot form a right-angled triangle, and the tower will not be stable.

To determine whether the tower will be stable, we need to check if the lengths of the blocks satisfy the conditions for forming a right-angled triangle. According to the Pythagorean theorem, in a right-angled triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides.

Let's label the blocks:

Blue block: Side A = 4.3 inches

Orange block: Side B = 5.2 inches

Red block: Side C = 6.1 inches

To form a stable tower, we need to check if the sum of the squares of the two shorter sides is equal to the square of the longest side.

Calculating the squares:

A² = 4.3² ≈ 18.49

B² = 5.2² ≈ 27.04

C² = 6.1² ≈ 37.21

Now, we need to find the longest side. Let's compare the squares:

C² (37.21) is the largest.

According to the Pythagorean theorem, for a right-angled triangle, the sum of the squares of the two shorter sides must be equal to the square of the longest side. In this case, the sum of the squares of A² and B² should be equal to C².

A² + B² ≈ 18.49 + 27.04 ≈ 45.53

However, the sum of A² and B² (45.53) is not equal to C² (37.21). Therefore, the blocks cannot form a right-angled triangle, and the tower will not be stable.

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Historically, the default rate on a certain type of commercial loan is 20 percent. If a bank makes 100 of these loans, what is the approximate probability that at least 26 will result in default? .0668 .0336 .0846 .2000

Answers

The approximate probability that at least 26 loans will result in default, out of 100 loans with a historical default rate of 20 percent, is 0.0846.

To solve this problem, we can use the binomial distribution formula, which is P(X ≥ k) = 1 - P(X < k), where X is a binomial random variable, k is the minimum number of successes we want to achieve (in this case, 26 defaults), and P is the probability of success on each trial (in this case, 0.2, or 20 percent).

Using this formula, we can find the probability of having less than 26 defaults as follows:

P(X < 26) = Σ(k=0 to 25) (100 choose k) * 0.2^k * (0.8)^(100-k) = 0.9154

(Note: the symbol "choose" represents the binomial coefficient, which can be calculated using the formula n choose k = n!/(k!(n-k)!)

Therefore, the probability of having at least 26 defaults is:

P(X ≥ 26) = 1 - P(X < 26) = 1 - 0.9154 = 0.0846

Therefore, the approximate probability that at least 26 loans will result in default is 0.0846.

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Evaluate the line integral, where C is the given curve. integral C xy^4 ds, C is the right half of the circle x^2+y^2=16

Answers

The value of the line integral is 256/5.

We can parameterize the curve C as x = 4cos(t) and y = 4sin(t) for t in [0, pi/2]. Then, ds = sqrt((dx/dt)^2 + (dy/dt)^2) dt = 4 dt.

Substituting in these values, we have:

integral C xy^4 ds = integral from 0 to pi/2 of (4cos(t))(4sin(t))^4 (4) dt

= 256 integral from 0 to pi/2 of cos(t) sin^4(t) dt

We can use integration by substitution with u = sin(t) and du = cos(t) dt to get:

256 integral from 0 to 1 of u^4 du = 256 * (1/5) u^5 evaluated from 0 to 1

= 256/5

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1. +2, -5, +3, -4, +1

2. -9, -2, +7, -6, +5

3. -5, -8, -3, +4, +3

4. +8, +5, +2, +7, -6

5. -4, +6, -6, +4, -7

6. +8, +5, +9, -6, -9

7. -7, -2, +4, -5, -1

8. +3, +5, -5, +6, +2

9. -6, +4, -8, +7, -2

10. -3, +8, -4, +1, -7

Answers

Answer:

1. -3

2. -5

3. -9

4. +16

5. -7

6. -3

7. -11

8. +11

9. -5

10. -5

Step-by-step explanation:

Gerry is registering for classes next semesters. He is deciding between two teachers, Dr Anderson and Dr. Bean. He speaks


To 17 friends that previously took the course from Dr. Anderson and also speaks to 17 friends that took it from Dr. Bean. Eight of his friends said they highly recommend Dr. Anderson. 11 of his friends highly recommended Dr. Bean

Answers

Gerry's decision will depend on a variety of factors, including the recommendations of his friends, the course syllabus, and his own personal preferences. It is important for him to carefully consider all of these factors before making his final decision.

Gerry is registering for classes next semester and he is deciding between two teachers, Dr. Anderson and Dr. Bean. In order to make an informed decision, Gerry speaks to 17 friends that previously took the course from Dr. Anderson and 17 friends that took it from Dr. Bean. Out of the 17 friends that took Dr. Anderson's course, 8 highly recommend him. Out of the 17 friends that took Dr. Bean's course, 11 highly recommend him.
Based on the recommendation of his friends, Gerry may be inclined to choose Dr. Bean, as he received more highly positive recommendations than Dr. Anderson. However, there are other factors that Gerry may want to consider before making his final decision. For example, Gerry may want to look at the syllabus for each course and compare them to see which one would be a better fit for his academic goals. He may also want to look at the times that each course is offered to see which one fits best with his schedule. Additionally, he may want to read reviews of both professors on websites such as Rate My Professor to see what other students have said about their teaching styles.
Ultimately, Gerry's decision will depend on a variety of factors, including the recommendations of his friends, the course syllabus, and his own personal preferences. It is important for him to carefully consider all of these factors before making his final decision.

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Question 18 of 25
Which expression gives the volume of a sphere with radius 15
A 4r(15¹)
B. 4r(15³)
C. (15²)
D (15)

Answers

Answer:

answer C!!

Step-by-step explanation:

Given  : sphere with radius 15.To find : Which expression gives the volume.Solution : We have given that radius of sphere = 15 units.Volume of sphere =  .Plugging the value of radius Volume of sphere =  .

what sequence would i use to solve the equation 6x + 3 = -9

Answers

Answer:

To solve the equation 6x + 3 = 9 for x, the operations that must be performed on both sides of the equation in order to isolate the variable x are subtraction and then division.

What is a linear equation?

A linear equation in one variable has the standard form Px + Q = 0. In this equation, x is a variable, P is a coefficient, and Q is constant.

How to solve this problem?

Given that 6x + 3 = 9.

First, we have to separate variable and constants. So, we have to subtract 3 from both sides.

6x + 3 - 3 = 9 - 3

i.e. 6x = 6

Now, to solve this equation, we use division.

x = 6/6 = 1

i.e. x = 1

Therefore, to solve the equation 6x + 3 = 9 for x, the operations that must be performed on both sides of the equation in order to isolate the variable x are subtraction and then division.

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Step-by-step explanation:

To solve the equation 6x + 3 = -9, you can follow the following sequence:

1. Subtract 3 from both sides of the equation to isolate the variable term:

6x + 3 - 3 = -9 - 3

This simplifies to 6x = -12.

2. Divide both sides of the equation by 6 to isolate x:6x/6 = -12/6

This simplifies to x = -2.

Therefore, the solution to the equation 6x + 3 = -9 is x = -2.

What is the IQR of this boxplot?

Answers

Answer:

The IQR is 16

---------------------

According to the box plot we have:

Q1 = 39 (the 25th percentile)Q3 = 55 (the 75th percentile)

The IQR is the difference of Q3 and Q1:

IQR = Q3 - Q1IQR = 55 - 39 = 16

Compute the curl of the vector field. F = (x2 − y2) i + 4xy j curl F =

Answers

Thus, the curl of the vector field F = (x2 − y2) i + 4xy j is (2x − 2y) k.

The curl of a vector field is a measure of how much the field rotates around a point. To compute the curl of the given vector field F = (x2 − y2) i + 4xy j, we need to calculate the cross product of the gradient operator (del) and F.

Using the formula for the curl, we have:
curl F = (∂Fz/∂y − ∂Fy/∂z) i + (∂Fx/∂z − ∂Fz/∂x) j + (∂Fy/∂x − ∂Fx/∂y) k

Where Fx, Fy, and Fz are the components of F in the x, y, and z directions, respectively.

In this case, F has no z-component, so we can simplify the formula to:
curl F = (∂Fy/∂x − ∂Fx/∂y) k

Now, let's calculate the partial derivatives:
∂Fx/∂y = 0 - (-2y) = 2y
∂Fy/∂x = 2x - 0 = 2x

Therefore, the curl of F is:
curl F = (2x − 2y) k

This means that the field rotates around the z-axis with a magnitude proportional to the difference between x and y. The curl is zero when x equals y, which corresponds to a point of no rotation.

In summary, the curl of the vector field F = (x2 − y2) i + 4xy j is (2x − 2y) k.

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A teacher wants to determine whether his students have mastered the material in their statistics (1 point) unit. Each student completes a pretest before beginning the unit and a posttest at the end of the unit. The results are in the table Student Pretest Score Posttest Score 72 75 82 85 90 86 78 84 87 82 80 78 84 84 92 91 81 84 86 86 10 The teacher's null hypothesis is that μ,-0, while his alternative hypothesis is μ) > 0 . Based on the data in the table and using a significance level of 0.01, what is the correct P-value and conclusion? The P-value is 0.019819, so he must reject the null hypothesis. The P-value is 0.00991, so he must fail to reject the null hypothesis OThe P-value is 0.019819, so he must fail to reject the null hypothesis OThe P-value is 0.00991, so he must reject the null hypothesis

Answers

the P-value (0.0000316) is less than the significance level of 0.01, we reject the null hypothesis. This means that the teacher can conclude that the students have indeed mastered the material in their statistics unit, based on the results of the pretest and posttest.

To determine the P-value and draw a conclusion, the teacher can use a one-tailed paired t-test since the same group of students took both the pretest and posttest. The null hypothesis is that the mean difference between pretest and posttest scores (μd) is equal to zero, and the alternative hypothesis is that μd is greater than zero.

Using a calculator or statistical software, the teacher can calculate the paired t-statistic for the data:

t = (x(bar)d - μd) / (s / √n)

Where x(bar)d is the sample mean of the difference scores, μd is the hypothesized population mean difference (0), s is the sample standard deviation of the difference scores, and n is the sample size (20).

Plugging in the values from the table, we get:

x(bar)d = 5.75

s = 4.091

n = 20

t = (5.75 - 0) / (4.091 / √20) = 4.67

Using a t-distribution table with 19 degrees of freedom (df = n-1), the P-value for this one-tailed test is 0.0000316.

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What is the explicit formula for the sequence?о an = 1-en-1 nten0, 1-e¹ 1-e² 1-e³ 1-e¹ 2+e², 2+e³, 2+e4,2+e5, •*•.О an 1-en-1 n+en+1О an = 1-en-1 2+enо an || 1-en 2+en

Answers

The explicit formula for the sequence an = 1-en-1 nten is an = 1 - e^(n-1) * (n-1) * e.

Alternatively, if we consider the sequence an = 1-en-1 2+en, the explicit formula would be an = 1 - e^(n-1) * (n-1) * e + e^(n-1) * (n+1) * e. Lastly, if we consider the sequence an = 1-en 2+en, the explicit formula would be an = 1 - e^n * n * e + e^(n-1) * (n+2) * e.

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find an equation for the conic that satisfies the given conditions. parabola, focus (−10, 0), directrix x = 0

Answers

The equation of the parabola that satisfies the given conditions is y^2 = 20(x + 5)

The given information tells us that the conic is a parabola with focus at (-10, 0) and directrix x = 0.
Since the directrix is a vertical line, we know that the parabola is opening to the left or right. In this case, since the focus is to the left of the directrix, the parabola opens to the left.
The standard form of a parabola that opens to the left with focus (h, k) and directrix x = a is:
(y - k)^2 = 4p(x - h)
where p is the distance from the vertex (h, k) to the focus, and also from the vertex to the directrix. In this case, the vertex is halfway between the focus and directrix, so it is at (-5, 0).
Since the directrix is x = 0, which is a vertical line passing through the origin, the distance from the vertex to the directrix is simply 5.
Therefore, p = 5, and the equation of the parabola is:
(y - 0)^2 = 4(5)(x + 5)
y^2 = 20(x + 5)
This is the equation of the parabola that satisfies the given conditions.

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1) Consider the interval 0≤x≤L. What is the second derivative, with respect to x, of the wave function ψn(x) in this interval? Express your answer in terms of n, x, L, and C as needed.
d2dx2ψn(x) =
2) What is U(x)ψn(x) in the interval 0≤x≤L? Express your answer in terms of n, L, and C as needed.
U(x)ψn(x) =
3) E is an as yet undetermined constant: the energy of the particle. What is Eψn(x) in the interval 0≤x≤L? Express your answer in terms of n, L, E, and C.
Eψn(x) =

Answers

Thus, 1) The second derivative, with respect to x, of the wave function: d2dx2ψn(x) = -Cn^2(pi/L)^2sin(n*pi*x/L).

2) U(x)ψn(x) = 0

3) Eψn(x) = -Cn^2(pi/L)^2Esin(n*pi*x/L)

1) The second derivative, with respect to x, of the wave function ψn(x) in the interval 0≤x≤L can be found by applying the second derivative operator to the wave function:

d2dx2ψn(x) = -Cn^2(pi/L)^2sin(n*pi*x/L)

where n is the quantum number and C is the normalization constant.

2) U(x)ψn(x) is the product of the potential energy function U(x) and the wave function ψn(x) in the interval 0≤x≤L. If the potential energy function is zero in this interval, then U(x)ψn(x) is also zero.

Therefore, U(x)ψn(x) = 0.

3) Eψn(x) is the product of the energy E and the wave function ψn(x) in the interval 0≤x≤L. Substituting the wave function expression from part 1 into this product, we get:

Eψn(x) = -Cn^2(pi/L)^2Esin(n*pi*x/L)
where E is the energy of the particle.

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Set up the triple integral needed to compute the volume of the tetrahedron bounded by the plane 140 + 35y + 102 - 70 = 0 and the coordinate planes.

Answers

The equation 140 + 35y + 102 - 70 = 0 can be simplified to 35y = -172, which gives y = -4.914.

The tetrahedron is bounded by the coordinate planes (x = 0, y = 0, z = 0) and the plane 140 + 35y + 102 - 70 = 0, which can be written as 35y = -172 or y = -4.914. Since the plane intersects the y-axis, it cuts off a triangular pyramid from the octant. The height of this pyramid is 4.914 units and its base is a right triangle with legs of length 140 and 102 units. Thus, the volume of this pyramid is given by:

V = (1/3) * (base area) * (height)

V = (1/3) * (140 * 102)/2 * 4.914

V = 14237.04 cubic units

To find the volume of the entire tetrahedron, we need to integrate over the region that the tetrahedron occupies. Since the tetrahedron is located in the first octant and bounded by the coordinate planes, we can set up the following triple integral:

∫∫∫E dV

where E is the solid region bounded by x = 0, y = 0, z = 0, and the plane 140 + 35y + 102 - 70 = 0. We can rewrite this equation as:

140 + 35y + 102 - 70 = 0

35y = -172

y = -4.914

Thus, the integral becomes:

∫∫∫E dV = ∫0^102 ∫0^(140-7/5y) ∫0^(-7/10y + 35/10) dz dx dy

The limits of integration for z are obtained from the equation of the plane, while the limits of integration for x and y are the limits of the triangular base of the tetrahedron.

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Write the equation in spherical coordinates.
(a) 2x2 - 3x + 2y2 + 2z2 = 0
? =
(b) 3x + 4y + 2z = 1
? =

Answers

(a) [tex]2 + (2 - 3/r) sin\theta cos\phi = 0[/tex], the equation in spherical coordinates.

(b) 3 sinθ cosφ + 4 sinθ sinφ + 2 cosθ = 1/r, the equation in spherical coordinates.

How to write the equation [tex]2x^2 - 3x + 2y^2 + 2z^2 = 0[/tex] in spherical coordinates?

(a) To write the equation [tex]2x^2 - 3x + 2y^2 + 2z^2 = 0[/tex]in spherical coordinates, we need to express x, y, and z in terms of spherical coordinates. We have

x = r sinθ cosφ

y = r sinθ sinφ

z = r cosθ

Substituting these expressions into the given equation, we get

[tex]2(r sin\theta cos\phi)^2 - 3(r sin\theta cos\phi) + 2(r sin\theta sin\phi)^2 + 2(r cos\theta)^2 = 0[/tex]

Simplifying, we get

[tex]2r^2(sin^2\theta cos^2\phi + sin^2\theta sin^2\phi) + 2r^2 cos^2\theta - 3r sin\theta cos\phi = 0[/tex]

Using the identity [tex]sin^2\theta + cos^2\theta = 1[/tex], we can simplify this equation further to get

[tex]2r^2 + (2r^2 - 3r) sin\theta cos\phi = 0[/tex]

Dividing both sides by [tex]r^2[/tex] and rearranging, we get

[tex]2 + (2 - 3/r) sin\theta cos\phi = 0[/tex]

This is the equation in spherical coordinates.

How to write the equation 3x + 4y + 2z = 1 in spherical coordinates?

(b) To write the equation 3x + 4y + 2z = 1 in spherical coordinates, we again need to express x, y, and z in terms of spherical coordinates. Substituting these expressions into the given equation, we get

3(r sinθ cosφ) + 4(r sinθ sinφ) + 2(r cosθ) = 1

Simplifying, we get

r(3 sinθ cosφ + 4 sinθ sinφ + 2 cosθ) = 1

Dividing both sides by r and rearranging, we get

3 sinθ cosφ + 4 sinθ sinφ + 2 cosθ = 1/r

This is the equation in spherical coordinates.

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Find the difference. Simplify your
answer completely.
5/6 - 3/4

Answers

I think the answer is 1/12

Answer: 1/12

Step-by-step explanation: the LCD of these two fractions is 12. 5/6 is equal to 10/12, and 3/4 is equal to 9/12. from here, you can find the difference in the numerators over the common denominator and that will be your answer. 10/12-9/12=1/12

Kavya is surveying how seventh-grade students get to school. In her first-
period class, 12 out of 28 students ride the bus to school. There are 140
students in seventh grade. Based on her survey, how many seventh-grade
students can she predict ride the bus to school?
A. 124
B. 48
C. 60
D. 327

Answers

She can estimate that 50 seventh-graders will be boarding the bus to go to school.

The unitary technique entails finding the value by multiplying the single value and then solving the problem using the initial value of a single unit.

By using the unitary technique, we can determine the value of many units from the value of a single unit as well as the value of multiple units from the value of a single unit. We typically utilise this technique for math calculations.

10 out of the 32 children in the first-period class that we are given ride the bus to school. There are 160 students in seventh grade.

Therefore, we have;

160/32=5

10 x 5 =50

Thus, the answer is 50

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Jake net pay is $160. 65 after deductions of $68. 85. He makes $8. 50 per hour how much hours did he work? Show working outs

Answers

Given that Jake's net pay is 160.65 after deductions of 68.85 and he makes 8.50 per hour. We need to find how much hours did he work. Let the hours he worked be h.

From the problem statement we can write an equation based on the above given information as:8.50h - 68.85 = 160.65Simplifying the equation,8.50h = 160.65 + 68.85= 229.50Now, dividing both sides by 8.5, we get,h = 229.50/8.5h ≈ 27Therefore, Jake worked for 27 hours .Let's verify this result: Total earning = 8.50hNet pay = Total earnings - Deductions=> 8.50 × 27 - 68.85 = 229.50 - 68.85 = 160.65Thus, the solution is Jake worked for 27 hours.

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use the given transformation to evaluate the integral. (9x 12y) da r , where r is the parallelogram with vertices (−1, 2), (1, −2), (4, 1), and (2, 5); x = 1 3 (u v), y = 1 3 (v − 2u)

Answers

The integral evaluates to[tex]∫∫(9x + 12y) daᵣ = ∫∫(9/3)(u + 4v - 4u[/tex]) dudv over the region r.

How to evaluate the integral using the given transformation?

To evaluate the given integral using the given transformation, we can express the integral in terms of the new variables u and v. The transformation equations are:

x = (1/3)(u + v)

y = (1/3)(v - 2u)

We need to calculate the integral (9x + 12y) da over the parallelogram region r.

First, we need to find the limits of integration in terms of u and v. The vertices of the parallelogram are (-1, 2), (1, -2), (4, 1), and (2, 5). Converting these points to u and v coordinates using the transformation equations, we get:

(-1, 2) -> (1/3, 2/3)

(1, -2) -> (1, -2)

(4, 1) -> (5/3, 1)

(2, 5) -> (1, 3)

The limits of integration for u are 1/3 to 5/3, and for v, it's 2/3 to 3.

Now, we can substitute the transformation equations into the integrand:

9x + 12y = 9[(1/3)(u + v)] + 12[(1/3)(v - 2u)]

= 3u + 3v + 4v - 8u

= -5u + 7v

Finally, we can rewrite the integral in terms of u and v

∫∫r (9x + 12y) da = ∫(1/3 to 5/3) ∫(2/3 to 3) (-5u + 7v) dv du

To evaluate this double integral, we integrate first with respect to v from 2/3 to 3, and then with respect to u from 1/3 to 5/3. The resulting integral will provide the answer to the problem.

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A shipping container is in the form of a right rectangular prism, with dimensions of 35 ft by 8 ft by 9 ft 9 in. If the container holds 1420 cubic feet of shipped goods, what percent is full? Round your answer to the nearest whole number if necessary

Answers

Rounded to the nearest whole number, the container is approximately 52% full.

To find the percentage that the shipping container is full, we need to compare the volume of the shipped goods to the total volume of the container.

Given dimensions:

Length = 35 ft

Width = 8 ft

Height = 9 ft 9 in

We need to convert the height to feet by dividing the inches by 12:

Height = 9 ft + (9/12) ft = 9.75 ft

Total volume of the container:

Volume = Length × Width × Height

Volume = 35 ft × 8 ft × 9.75 ft

Volume = 2730 ft³

Volume of the shipped goods:

Given as 1420 ft³

To find the percentage filled, we divide the volume of the shipped goods by the total volume of the container and multiply by 100:

Percentage filled = (Volume of shipped goods / Total volume of container) × 100

Percentage filled = (1420 ft³ / 2730 ft³) × 100

Percentage filled ≈ 52.0%

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Determine whether you would reject or fail to reject the null hypothesis in the following situations: a. t = 2.58, N = 21, two-tailed test at α = 0.05 b. t = 1.99, N = 49, one-tailed test at α = 0.01 c. μ = 47.82, 99% CI = (48.71, 49.28) d. μ = 0, 95% CI = (-0.15, 0.20) pg. 160

Answers

a. t = 2.58, N = 21, two-tailed test at α = 0.05:

To determine whether to reject or fail to reject the null hypothesis, we need to compare the calculated t-value to the critical t-value from a t-distribution with N - 1 degrees of freedom at the given alpha level.

For a two-tailed test at α = 0.05 with 21 degrees of freedom, the critical t-value is approximately ±2.080.

Since the calculated t-value of 2.58 is greater than the critical value of 2.080, we would reject the null hypothesis.

b. t = 1.99, N = 49, one-tailed test at α = 0.01:

For a one-tailed test, the critical value is based on the tail of the distribution where the alternative hypothesis is located.

At α = 0.01 and 49 degrees of freedom, the critical value for a one-tailed test is approximately 2.404.

Since the calculated t-value of 1.99 is less than the critical value of 2.404, we would fail to reject the null hypothesis.

c. μ = 47.82, 99% CI = (48.71, 49.28):

The confidence interval (CI) gives us a range of values that the population mean is likely to be within. In this case, we have a 99% CI, which means that there is a 99% chance that the true population mean falls between 48.71 and 49.28.

Since the null hypothesis typically states that the population mean equals a certain value, in this case, 47.82, we can conclude that we would reject the null hypothesis.

d. μ = 0, 95% CI = (-0.15, 0.20):

The confidence interval in this case gives us a range of values that the population mean is likely to be within. Since the null hypothesis typically states that the population mean equals a certain value, in this case, 0, we can conclude that we would fail to reject the null hypothesis, since the interval includes 0.

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The function f(x) = x2 is graphed above. Which of the graphs below represents the function g(x) = (x + 1)2? A parabola declines through (negative 2, 5), (negative 1 point 5, 3), (negative 1, 2), (0, 1) and rises through (1, 2), (1 point 5, 3) and (2, 5) on the x y coordinate plane. W. A parabola declines through (negative 2, 3), (negative 1 point 5, 1), (1, 0), (0, negative 1) and rises through (1, 1), (1 point 5, 1) and (2, 2) on the x y coordinate plane. X. A parabola declines through (negative 3, 4), (negative 2 point 5, 2), (negative 2, 1), (negative 1, 0), (0, 1), (0 point 5, 2) and (1, 4) on the x y coordinate plane. Y. A parabola declines through (negative 1, 4), (negative 0 point 5, 2), (0, 1) and (1, 0) and rises through (2, 1), (2 point 5, 2) and (3, 4)  on the x y coordinate plane. Z.

Answers

The graph of the function g(x) is the graph (a) i.e. the top left

How to determine the graph of the function g(x).

From the question, we have the following parameters that can be used in our computation:

f(x) = x²

See attachment for the possible graphs of the functions

The function g(x) is given as

g(x) = (x + 1)²

This means that

The function f(x) is shifted up by 1 unit to get the function

Using the above as a guide, we have the following:

The graph of the function g(x) is the graph (a) i.e. the top left

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G(h, s) is the expected grade-point average of a typical freshman college student who had a gpa of h in high school and made a combined score of s on the sat. What is the rate of change of the expected gpa with respect to the sat score when the high school gpa is 3. 6 and the sat score is 1104? (a) write the mathematical notation for the partial rate-of-change function needed to answer the question posed. ? ? (h, s)

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The answer to the question is that we cannot determine the rate of change of the expected GPA with respect to the SAT score without additional information.

The partial rate-of-change function needed to answer this question is the partial derivative of G(h, s) with respect to s, denoted as ∂G/∂s.

Using the chain rule of differentiation, we can write:

∂G/∂s = (∂G/∂h) x (dh/ds) + (∂G/∂s)

where dh/ds is the rate of change of high school GPA with respect to SAT score.

To evaluate the partial derivative at (h,s) = (3.6, 1104), we need to compute both ∂G/∂h and dh/ds at that point. However, the problem does not provide any information about the functional form of G(h, s) or the relationship between high school GPA and SAT score. Without that information, it is not possible to calculate the partial rate-of-change function or the requested derivative.

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find a second-degree polynomial p such that p(1) = 2, p'(1) = 2, and p''(1) = 4.

Answers

To find a second-degree polynomial satisfying the given conditions, we can start with a general form of a second-degree polynomial:

p(x) = ax^2 + bx + c

Given that p(1) = 2, p'(1) = 2, and p''(1) = 4, we can substitute these values into the polynomial and its derivatives to form a system of equations.

p(1) = 2:

a(1)^2 + b(1) + c = 2

a + b + c = 2

p'(1) = 2:

2a(1) + b = 2

2a + b = 2

p''(1) = 4:

2a = 4

a = 2

From equation 3, we find that a = 2. Substituting this value into equation 2, we can solve for b:

2(2) + b = 2

4 + b = 2

b = -2

Finally, substituting the values of a and b into equation 1, we can solve for c:

2 + (-2) + c = 2

c = 2

Therefore, the second-degree polynomial satisfying the given conditions is:

p(x) = 2x^2 - 2x + 2

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Find the length of arc AB. Use 3. 14 for 7.


Round to the nearest tenth.


5 7. 9 cm


В


66. 49


D


[? ]cm

Answers

The length of the arc AB is approximately 66.5 cm. We can use the formula given below to find the length of the arc:arc length = (central angle / 360°) x (2πr), where r is the radius of the circle. Here, we are given the radius of the circle as 5 7.9 cm and the central angle as 360°.

Thus, the formula becomes: arc length = (360° / 360°) x (2 x 3.14 x 5 7.9) arc length = 2 x 3.14 x 57.9 arc length = 364.452 cm ≈ 364.5 cm However, the answer needs to be rounded to the nearest tenth. Since the tenths place is occupied by 4, we need to round up the hundredths place, which is 5. Thus, the final answer is: arc length AB = 66.5 cm (rounded to the nearest tenth).Therefore, the length of arc AB is approximately 66.5 cm.

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The length of arc AB is 5.5 cm when rounded to the nearest tenth.

To find the length of arc AB, the radius and the angle at the center are required since they are the main parameters for calculating the length of arc AB.

Since the radius has not been given, it can be computed as shown below.

r = 2πr / 360°

= 7 x 3.14 / 360°

= 0.061 cm/degree

The angle at the center of AB is 180°/2 = 90°.

Therefore, the length of arc AB is given by

L = rθ

= 0.061 cm/degree x 90°

= 5.49 cm

Hence, the length of arc AB is 5.5 cm when rounded to the nearest tenth.

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Find the vertex, focus, and directrix of the parabola. x2 = 2y vertex (x, y) = Incorrect: Your answer is incorrect. focus (x, y) = Incorrect: Your answer is incorrect. directrix Incorrect: Your answer is incorrect.

Answers

The vertex, focus, and directrix of the parabola x^2 = 2y are Vertex: (0, 0), Focus: (0, 1/2), Directrix: y = -1/2

The given equation is x^2 = 2y, which is a parabola with vertex at the origin.

The general form of a parabola is y^2 = 4ax, where a is the distance from the vertex to the focus and to the directrix.

Comparing the given equation x^2 = 2y with the general form, we get 4a = 2, which gives us a = 1/2.

Hence, the focus is at (0, a) = (0, 1/2), and the directrix is the horizontal line y = -a = -1/2.

Therefore, the vertex, focus, and directrix of the parabola x^2 = 2y are:

Vertex: (0, 0)

Focus: (0, 1/2)

Directrix: y = -1/2

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The summary statistics for a certain set of points are: n = 17, s_e = 2.080. sigma(x - x)^-2 = 16.106, and = b_1 = 1.388. Assume the conditions of the linear model hold. A 95% confidence interval for beta_1 will be constructed. i). How many degrees of freedom are there for the critical value? ii). What is the critical value? iii). What is the margin of error? iv). Construct the 95% confidence interval.

Answers

i) Degrees of freedom are there for the critical value will be 15.

ii) The critical value will be 2.131.

iii) The margin of error will be 1.004

iv) The 95% confidence interval that can be constructed will be between 0.078 and 2.698.

i) The degrees of freedom for the critical value is n-2 = 17-2 = 15.

ii) The critical value can be found using a t-distribution table with 15 degrees of freedom and a confidence level of 95%. The critical value is 2.131.

iii) The margin of error can be calculated using the formula:

ME = t_(alpha/2) * SE_b1

where t_(alpha/2) is the critical value, and SE_b1 is the standard error of the slope coefficient.

ME = [tex]2.131 \times 2.080 / \sqrt{(16.106)}[/tex] = 1.004

iv) The 95% confidence interval can be constructed using the formula:

CI = b1 +/- t_(alpha/2) [tex]\times[/tex]SE_b1

CI = [tex]1.388 +/- 2.131 \times 2.080 / \sqrt{(16.106)}[/tex] = (0.078, 2.698)

Therefore, we can be 95% confident that the true slope coefficient beta_1 falls between 0.078 and 2.698.

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A tree grows 1/4 foot in 1/12 year. Write the rate at which this tree grows in 1 year as a fraction.

Answers

The rate at which the tree will grow in just 1 year would be = 3ft/year.

How to calculate the rate of growth of the tree?

The quantity of tree that grows in 1/12 year = 1/4 ft

The quantity of tree that will grow in 1 year = X ft.

That is;

1/12 years = 1/4ft

1 year = X

Make X the subject of formula;

X= 1/4÷1/12

X = 1/4×12/1

X = 3 ft

Therefore, the rate at which the tree will grow in just 1 year would be = 3 ft/year.

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) if 1100 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. volume = (include units)

Answers

Answer: The largest possible volume of the box is 2321.08 cubic centimeters, and this occurs when the side length of the square base is approximately 19.15 cm and the height of the box is approximately 6.84 cm.

Step-by-step explanation:

Let's denote the side length of the square base as "x" and the height of the box as "h".Since the box has an open top, we only need to consider the 5 faces of the box. The area of the base is x^2, and the areas of the other four faces are each equal to xh (since the box has equal height on all sides).Thus, the total surface area of the box is:x^2 + 4xhWe are given that 1100 square centimeters of material is available to make the box, so we can set up an equation based on this information:x^2 + 4xh = 1100We want to maximize the volume of the box, which is given by:V = x^2h.

To solve for the maximum volume, we need to express h in terms of x using the equation for the surface area:4xh = 1100 - x^2

h = (1100 - x^2)/(4x)

Substituting this expression for h into the equation for the volume, we get:V = x^2 * (1100 - x^2)/(4x). Simplifying this expression, we get:V = (1/4)x(1100x - x^3)

To get the maximum volume, we need to take the derivative of this expression with respect to x, set it equal to zero, and solve for x:dV/dx = 275 - (3/4)x^2 = 0

x^2 = 366.67

x = 19.15 cm (rounded to two decimal places)

To check that this gives us a maximum, we can take the second derivative:

d^2V/dx^2 = -3x/2 < 0 (for x > 0)

Since the second derivative is negative, this tells us that we have found a maximum.Now we can find the corresponding value of h:

h = (1100 - x^2)/(4x)

h = (1100 - (366.67))/(4(19.15))

h = 6.84 cm (rounded to two decimal places)

Finally, we can calculate the maximum volume:

V = x^2h

V = (19.15)^2 * 6.84

V = 2321.08 cubic centimeters (rounded to two decimal places).

Therefore, the largest possible volume of the box is 2321.08 cubic centimeters, and this occurs when the side length of the square base is approximately 19.15 cm and the height of the box is approximately 6.84 cm.

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