1. Which of the following is 60% in fraction form?A. 25B. 35C. 45

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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(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.

(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.

(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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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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Sally is trying to wrap a CD for her brother's birthday. The CD measures 0.5 cm by 14 cm by 12.5 cm. We need to calculate how much paper Sally will need to wrap the CD.

To calculate the amount of paper Sally needs, we need to calculate the surface area of the CD. The CD's surface area is calculated by adding up the areas of all six sides, which are all rectangles. Therefore, we need to calculate the area of each rectangle and then add them together to find the total surface area.The CD has three sides that measure 14 cm by 12.5 cm and two sides that measure 0.5 cm by 12.5 cm. Finally, it has one side that measures 0.5 cm by 14 cm.So, we have to calculate the area of all the sides:14 x 12.5 = 175 (two sides)12.5 x 0.5 = 6.25 (two sides)14 x 0.5 = 7 (one side)Total surface area = 175 + 175 + 6.25 + 6.25 + 7 = 369.5 cm²Therefore, Sally will need 369.5 cm² of paper to wrap the CD.

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

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

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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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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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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A(11) counts partitions of 11 into parts congruent to ±1 mod 6 is A(11) = 2 and B(11) counts partitions of 11 into distinct parts congruent to ±1 mod 3 is  B(11) = 2. C(11) counts partitions of 11 into parts differing by at least 3 and multiples of 3 differing by at least 6 is C(11) = 1.

A(11) counts the number of partitions of 11 into parts congruent to ±1 mod 6. One such partition is 11, which is already congruent to ±1 mod 6. Another partition is 7+1+1+1+1, which consists of four parts that are congruent to 1 mod 6 and one part that is congruent to -1 mod 6. Therefore, A(11) = 2.

B(11) counts the number of partitions of 11 into distinct parts congruent to ±1 mod 3. One such partition is 11, which is already congruent to ±1 mod 3. Another partition is 7+3+1, which consists of three distinct parts that are congruent to 1 mod 3. Therefore, B(11) = 2.

C(11) counts the number of partitions of 11 into parts that differ by at least 3, with the added condition that any parts that are multiples of 3 must differ by at least 6. One such partition is 11, which is the only way to partition 11 into parts that differ by at least 3. Therefore, C(11) = 1.

Therefore, the partitions of 11 counted by A(11), B(11), and C(11) are:
A(11): 11, 7+1+1+1+1
B(11): 11, 7+3+1
C(11): 11

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

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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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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The limit of the nth term as n becomes increasingly large is 1/3. The Option B.

To get limit of the nth term as n approaches infinity, we will analyze behavior of highest degree terms in the numerator and denominator.

In numerator, the highest degree term is [tex]2n^5.[/tex]

In denominator, the highest degree term is [tex]6n^4[/tex].

As the n becomes increasingly large, the influence of lower-degree terms becomes negligible when compared to highest degree terms.

The limit of the nth term is derived by dividing coefficient of highest degree term in numerator (2) by coefficient of the highest degree term in the denominator (6).

The limit is 2/6 which simplifies to 1/3.

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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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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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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

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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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:

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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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:

6x + 3 - 3 = -9 - 3

This simplifies to 6x = -12.

This simplifies to x = -2.

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

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

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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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 =  .

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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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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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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