Hey I really need help. How do I make a histogram with this information??


APPLY YOUR KNOWLEDGE 1. 6 The Changing Fate of America. In 1980, approximately 20% of adults aged 18–34 were considered minorities, reporting their ethnicity as other than non- Hispanic white. By the end of 2013, that percentage had more than doubled. How are minorities between the ages of 18 and 34 distributed in the United States? In the country as a whole, 42. 8% of adults aged 18–34 are considered minorities, but the states vary from 8% in Maine and Vermont to 75% in Hawaii. Table 1. 2 presents the data for all 50 states and the District of Columbia. Make a histogram of the percents using classes of width 10% starting at 0%. That is, the first bar covers 0% to < 10%, the second covers 10% to < 20%, and so on. (Make this histogram by hand, even if you have software, to be sure you understand the process. You may then want to compare your histogram with your software's choice. )​

since LHS = -16x + 16C - 4, and RHS = [tex]4|x|^4[/tex], so they are not equal. Therefore, 4x is not a solution of the differential equation y' + 4y = 4ex

To show that [tex]y = 4e^{(-4x)}  - 4x + C[/tex] is a solution of the differential equation y' + 4y = 4ex, we need to verify that when y is substituted into the differential equation, both sides are equal.

First, let's find y' by taking the derivative of y:
[tex]y' = -16e^{(-4x)}  - 4[/tex]

Now, we can substitute y and y' into the differential equation and simplify:
[tex]y' + 4y = (-16e^{(-4x)}  - 4) + 4(4 e^{(-4x)}  - 4x + C)[/tex]

[tex]= -16e^{(-4x)}  + 16e^{(-4x)}  - 16x + 16C - 4[/tex]
= -16x + 16C - 4

Next, we need to find the right-hand side of the differential equation by substituting 4ex:
[tex]4ex = 4e^{(4ln|x|)}   = 4e^{(ln|x|^{4}) }    = 4|x|^{4}[/tex]

Finally, we can compare the left-hand side and right-hand side:
LHS = y' + 4y = -16x + 16C - 4
RHS = [tex]4|x|^4[/tex]

We can see that LHS = -16x + 16C - 4, and RHS = [tex]4|x|^4[/tex], so they are not equal. Therefore, 4x is not a solution of the differential equation y' + 4y = 4ex.

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Hi! The solubility of PbF₂ in a solution (Ksp =3.60 × 10⁻⁸) containing 0.0450 M Pb²⁺ ions is 2.83 × 10⁻⁴ M F⁻ ions.

To find the solubility of PbF₂ in a solution containing 0.0450 M Pb²⁺ ions, you can follow these steps:
1. Write the balanced equation for the dissolution of PbF₂:
  PbF₂(s) ⇌ Pb²⁺(aq) + 2F⁻(aq)
2. Write the Ksp expression for PbF₂:
  Ksp = [Pb²⁺][F⁻]²
3. Substitute the given Ksp value and the concentration of Pb²⁺ ions:
  3.60 × 10⁻⁸ = (0.0450)[F⁻]²
4. Solve for the concentration of F⁻ ions:
  [F⁻]² = (3.60 × 10⁻⁸) / 0.0450
  [F⁻]² = 8.00 × 10⁻⁷
  [F⁻] = 2.83 × 10⁻⁴ M

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Answer:

the answer is 2400

Step-by-step explanation:

The minimum volume of the sphere that contains the cylinder is (1/6)π cubic centimeters.

Let's assume that the cylinder is inscribed inside a sphere, which means that the diameter of the sphere is equal to the height of the cylinder. Let's also assume that the radius of the sphere is r and the radius of the cylinder is c.

The volume of the cylinder is given by:

V_cylinder = πc²h

where h is the height of the cylinder.

We are given that the volume of the cylinder is 12π³ cubic centimeters, so we can write:

The diameter of the sphere is equal to the height of the cylinder, so we have:

The volume of the sphere is given by:

V_sphere = (4/3)πr³

We want to find the minimum volume of the sphere that contains the cylinder. In other words, we want to minimize V_sphere subject to the constraint that the cylinder is inscribed in the sphere.

Using the formula for h in terms of r, we can rewrite the constraint as:

Substituting this expression for r into the formula for the volume of the sphere, we get:

To find the minimum value of V_sphere, we need to find the critical points. Taking the derivative of V_sphere with respect to c and setting it equal to zero, we get:

dV_sphere/dc = -1728π⁵/c⁷ = 0

Solving for c, we get:

c = (1728π⁵)¹/⁷

Substituting this value of c into the formula for the volume of the sphere, we get:

V_sphere = 288π⁵/(1728π⁵) = 1/6

Therefore, the minimum volume of the sphere that contains the cylinder is

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Answer: B. 4 inches

Step-by-step explanation:

The width of the stage can be found by multiplying the width of the scale drawing by the scale factor. Since the scale is 1 inch: 7 feet, you can set up a proportion:

1 inch / 7 feet = x inches / 28 feet

To solve for x (the width of the scale drawing), cross-multiply and simplify:

7 feet * x inches = 1 inch * 28 feet

7x = 28

x = 4

Therefore, the width of the stage is 4 inches.

By using the distributive property of subtraction, expression 11x+3y subtracted from 13x+9y is equal to 2x+6y.

The distributive property of subtraction states that when subtracting a value from a sum, the same result can be achieved by subtracting the value from each addend separately and then finding the difference between the two results.

An expression is a combination of numbers, variables, and operators, such as +, -, x, ÷, and parentheses, that represents a mathematical relationship or quantity. It does not contain an equals sign.

According to the given information:

In the given context, the word "from" means to subtract.

So, if we have to subtract 11x+3y from 13x+9y, we can rewrite it as:

(13x+9y) - (11x+3y)

Then, by using the distributive property of subtraction, we can simplify the above expression as follows:

13x+9y - 11x-3y

Now, combining like terms, we get:

2x + 6y

Therefore, 11x+3y subtracted from 13x+9y is equal to 2x+6y.

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The given statement is FALSE. The determinant of the sum of two matrices does not equal the sum of the determinants of the matrices.

In fact, the determinant of the sum of two matrices is generally not even equal to the sum of the determinants of the matrices.
This property does not hold true for determinants. In general, the determinant of the sum of two matrices A and B

(det(A+B)) is not equal to the sum of their individual determinants (det(A) + det(B)).

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The area under the curve is approximately 77 square units, represents the total production from the end of the sixth year to the end of the eleventh year is 77 thousand barrels so that correct interpretation of the result is option B.

To find the area between the graph of R and the t-axis over the interval (6,11), we need to integrate the rate function R(t) over this interval. The integral of R(t) from 6 to 11 will represent the total production of oil during this period.

∫(100/(t+10) + 10) dt from 6 to 11

First, split the integral into two parts:

∫(100/(t+10)) dt + ∫10 dt from 6 to 11

The first part can be integrated using the substitution method (u = t+10, du = dt):

100∫(1/u) du from 6 to 11, which results in 100(ln|u|) evaluated from 16 to 21.

The second part is simply 10t evaluated from 6 to 11.

Now evaluate and find the sum:

100(ln|21| - ln|16|) + 10(11 - 6)

100(ln|21/16|) + 50 ≈ 77

So, the area under the curve is approximately 77 square units. This represents the total production from the end of the sixth year to the end of the eleventh year, which will be approximately 77 thousand barrels.

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Answer:

[tex]\textsf{C)}\quad \dfrac{5}{16}\; \sf yd^2[/tex]

Step-by-step explanation:

The net of a square-based pyramid is made up of:

From inspection of the given net:

The area of a square is the square of one of its side lengths.

The area of a triangle is half the product of its base and height.

The total surface area of the pyramid is the sum of the area of the square base and the area of 4 congruent triangles.

Therefore:

[tex]\begin{aligned}\sf Total\;surface\;area&=\sf Area_{square}+4 \cdot Area_{triangle}\\\\&=s^2+4 \cdot \dfrac{1}{2}bh\\\\&=\left(\frac{1}{4}\right)^2+4 \cdot \frac{1}{2} \cdot \frac{1}{4} \cdot \frac{1}{2}\\\\&=\dfrac{1^2}{4^2}+\dfrac{4 \cdot 1 \cdot 1 \cdot 1}{2 \cdot 4 \cdot 2}\\\\&=\dfrac{1}{16}+\dfrac{4}{16}\\\\&=\dfrac{1+4}{16}\\\\&=\dfrac{5}{16}\; \sf yd^2\end{aligned}[/tex]

Therefore, the surface area of the pyramid is 5/16 yd².

To find the volume of E, we need to integrate the volume element over E. Since E is defined by the sphere x^2+y^2+z^2=1, the plane z=0, and the cone z=√x^2+y^2, we can express E as:

E = {(x, y, z) | x^2+y^2+z^2≤1, z≥0, z≤√x^2+y^2}, To integrate over E, we can use cylindrical coordinates, where x=r*cos(θ), y=r*sin(θ), and z=z. The volume element in cylindrical coordinates is r*dz*dr*dθ. Thus, the volume of E can be found by integrating the volume element over the region E in cylindrical coordinates: V = ∫∫∫E r*dz*dr*dθ.

The limits of integration for each variable are as follows:
- θ: 0 to 2π, since we want to cover the full circle around the z-axis.
- r: 0 to 1, since we are restricted to the sphere x^2+y^2+z^2=1.
- z: 0 to √(r^2), since we are restricted to the cone z=√x^2+y^2.

Note that we take the square root of r^2 in the upper limit of integration for z because the cone has a slope of 45 degrees, which means that z=√(r^2) on the cone. Now we can set up the integral: V = ∫0^2π ∫0^1 ∫0^√(r^2) r*dz*dr*dθ
Integrating with respect to z first, we get: V = ∫0^2π ∫0^1 r*√(r^2)*dr*dθ
V = ∫0^2π ∫0^1 r^2*dr*dθ
V = ∫0^2π [r^3/3]0^1 dθ
V = ∫0^2π 1/3 dθ
V = (1/3)*[θ]0^2π
V = (1/3)*(2π-0)
V = 2π/3, Therefore the volume of E is 2π/3 cubic units.

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The average rate of change of the function f(t) = 2t² - 3 over the interval [1, 1.1] is 4.1. The instantaneous rates of change at t = 1 and t = 1.1 are 4 and 4.4, respectively.

To find the average rate of change, use the formula (f(b) - f(a)) / (b - a):
1. Calculate f(1) and f(1.1) using the given function.
2. Plug the values into the formula and solve for the average rate of change.

For the instantaneous rates of change, find the derivative of f(t) and evaluate it at t = 1 and t = 1.1:
1. Differentiate f(t) with respect to t.
2. Substitute t = 1 and t = 1.1 to find the instantaneous rates of change at these points.

Comparing the values, the average rate of change (4.1) lies between the instantaneous rates of change at the endpoints (4 and 4.4).

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First, let's compute the 6-point DFT of x = [1, 2, 3, 4, 5, 6]:

[tex]X[k] = ∑_{n=0}^{5} x[n] exp(-i 2πnk/6)[/tex]

For k = 0:

[tex]X[0] = ∑_{n=0}^{5} x[n] exp(-i 2πn(0)/6)\\= ∑_{n=0}^{5} x[n]\\= 1 + 2 + 3 + 4 + 5 + 6\\= 21[/tex]

For k = 1:

[tex]X[1] = ∑_{n=0}^{5} x[n] exp(-i 2πn(1)/6)\\= ∑_{n=0}^{5} x[n] exp(-i πn/3)\\= x[0] + x[1] exp(-i π/3) + x[2] exp(-i 2π/3) + x[3] exp(-i π) + x[4] exp(-i 4π/3) + x[5] exp(-i 5π/3)\\= 1 + 2 exp(-i π/3) + 3 exp(-i 2π/3) + 4 exp(-i π) + 5 exp(-i 4π/3) + 6 exp(-i 5π/3)[/tex]

For k = 2:

X[2] = ∑_{n=0}^{5} x[n] exp(-i 2πn(2)/6)

= ∑_{n=0}^{5} x[n] exp(-i 2πn/3)

= x[0] + x[1] exp(-i 2π/3) + x[2] exp(-i 4π/3) + x[3] exp(-i 2π) + x[4] exp(-i 8π/3) + x[5] exp(-i 10π/3)

= 1 + 2 exp(-i 2π/3) + 3 exp(-i 4π/3) + 4 + 5 exp(-i 8π/3) + 6 exp(-i 10π/3)

For k = 3:

X[3] = ∑_{n=0}^{5} x[n] exp(-i 2πn(3)/6)

= ∑_{n=0}^{5} x[n] exp(-i πn)

= x[0] + x[1] exp(-i π) + x[2] exp(-i 2π) + x[3] exp(-i 3π) + x[4] exp(-i 4π) + x[5] exp(-i 5π)

= 1 - 2 + 3 - 4 + 5 - 6

= -3

For k = 4:

X[4] = ∑_{n=0}^{5} x[n] exp(-i 2πn(4)/6)

= ∑_{n=0}^{5} x[n] exp(-i 4πn/3)

= x[0] + x[1] exp(-i 4π/3) + x[2] exp(-i 8π/3) + x[3] exp(-i 4π) + x

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In this function, option C; 2.9 million is the population of the city in 1990 and 0.08 million is the increase per year in the population

Let t be the time in year, P(t) be  the population in millions

we have population, in millions, of a city t years after 1990 is given by the equation P(t) = 2.9 + 0.08t.

This is a linear equation

P(t) = 2.9 + 0.08t

where

The term 2.9 is the y-intercept of the linear equation, it is the population of the city in 1990

The term  0.08 is the slope of the linear equation

The term represent the increase per year in the population;

0.08t

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The complete question is;

The population, in millions, of a city t years after 1990 is given by the equation P(t) = 2.9 + 0.08t. In this function, A) 0.08 million is the population of the city in 1990 and 2.9 million is the increase per year in the population. B) 2.9 million is the population of the city in 1991 and 2.98 million is the population in 1992. C) 2.9 million is the population of the city in 1990 and 0.08 million is the increase per year in the population. D) 2.9 million is the population of the city in 1990 and 0.08 million is the decrease per year in the population.

The values of the first six terms of the sequence are

1) a₀ = -1

2) a₁ = 2

3) a₂ = -4

4) a₃ = 8

5) a₄ = -16

6) a₅ = 32

The given sequence is defined recursively as follows

aₙ = -2aₙ-1

where a₀ = -1.

This means that each term in the sequence is equal to twice the negative of the previous term. To find the first few terms of the sequence, we can start with the given value of a0 and apply the recursive formula repeatedly to generate the next terms.

Using this approach, we get

a₁ = -2a₀ = -2(-1) = 2

a₂ = -2a₁ = -2(2) = -4

a₃ = -2a₂ = -2(-4) = 8

a₄ = -2a₃ = -2(8) = -16

a₅ = -2a₄ = -2(-16) = 32

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Geometry leading the eye from a specific place on a drawing to a block of text.  By incorporating geometry in your design, you can effectively lead the viewer's eye from a specific place on a drawing to a block of text, ensuring they take in the information you wish to convey.

In art and design, geometry can be used to create visual pathways that guide the viewer's eye from one part of a composition to another. To lead the eye from a specific place on a drawing to a block of text, you can use geometric shapes, lines, and angles strategically.
Here's a step-by-step explanation:
Step:1. Identify the starting point on the drawing and the block of text you want to direct the viewer's attention to.
Step2. Use geometric shapes such as rectangles, triangles, or circles to create a visual connection between the two points. Place these shapes along a path that connects the drawing and the text.
Step3. Utilize lines or angles to reinforce this connection. Lines can be straight, curved, or diagonal, while angles can be acute, obtuse, or right. Experiment with different combinations to create a visually appealing pathway.
Step4. Use color, contrast, or size to emphasize the geometric elements and enhance the overall composition.

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proved the identity:

[tex]1/tanh(x) - 1/cosh^2(x) = e^{2x}[/tex]

We can start by manipulating the left-hand side of the equation:

[tex]1 - tanh(x) = sech^2(x)[/tex] (using the identity[tex]tanh^2(x) + sech^2(x) = 1)[/tex]

Therefore, we have:

[tex]1 - tanh(x) = 1/cosh^2(x)[/tex]

Substituting this into the original equation, we get:

[tex]1/tanh(x) - 1/cosh^2(x) = e^(2x)[/tex]

Multiplying both sides by sinh^2(x), we get:

[tex]sinh^2(x)/tanh(x) - sinh^2(x)/cosh^2(x) = e^{2x}*sinh^2(x)[/tex]

Using the identity [tex]sinh^2(x) = (cosh(2x) - 1)/2 , cosh^2(x) = (cosh(2x) + 1)/2,[/tex]we can simplify the left-hand side:

[tex](cosh(2x) - 1)/sinh(x) - (cosh(2x) - 1)/(cosh(2x) + 1) = e^{2x}*(cosh(2x) - 1)/2[/tex]

Multiplying both sides by (cosh(2x) + 1), we get:

[tex](cosh(2x) - 1)(cosh(2x) + 1)/sinh(x) - (cosh(2x) - 1) = e^{2x}(cosh(2x) - 1)*(cosh(2x) + 1)/2[/tex]

Simplifying the left-hand side further:

[tex](cosh^2(2x) - 1)/sinh(x) - (cosh(2x) - 1) = e^{2x}*sinh(2x)^2/2[/tex]

Using the identity sinh(2x) = 2*sinh(x)*cosh(x), we can simplify further:

[tex](cosh^2(2x) - 1)/sinh(x) - (cosh(2x) - 1) = 2*e^{2x}sinh(x)^2cosh(x)^2[/tex]

Using the identity[tex]cosh^2(x) - sinh^2(x) = 1[/tex], we can simplify the left-hand side:

[tex]cosh(2x)/sinh(x) = 2*e^{2x}sinh(x)^2cosh(x)^2[/tex]

Using the identity [tex]cosh(x)/sinh(x) = 1/tanh(x),[/tex] we can simplify further:

[tex]2/tanh(2x) = 2*e^{2x}sinh(x)^2cosh(x)^2[/tex]

Simplifying the right-hand side using the identity

[tex]sinh(2x) = 2*sinh(x)*cosh(x),[/tex]we get:

[tex]2/tanh(2x) = e^{2x}*(sinh(2x)/2)^2[/tex]

Using the identity[tex]sinh(2x) = 2*sinh(x)*cosh(x)[/tex]again, we can further simplify:

[tex]2/tanh(2x) = e^{2x}*(sinh(x)*cosh(x))^2[/tex]

Using the identity[tex]tanh(2x) = 2*tanh(x)/(1 + tanh^2(x))[/tex], we can simplify the left-hand side:

[tex]1 + tanh^2(x) = 2/e^{2x}[/tex]

Substituting this into the identity above, we get:

[tex]1/tanh(x) - 1/cosh^2(x) = e^{2x}[/tex]

Therefore, the identity is true.

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Answer:

$1.10

Step-by-step explanation:

Given: 5 pens cost a total of $2.75.

Divide 2.75 by 5 to find how much one pen costs.

2.75/5 = 0.55

To find how much two pens cost we take 0.55 and multiply by 2.

0.55*2 = $1.10

It will cost $1.10 for two pens.

Answer:

$1.1

Step-by-step explanation:

5 pens = $2.75

2 pens =      x

Let x by the unknown price of the 2 pens

x =  $2.75 × 2 pens    =   $5.5      =    $1.1

               5 pens                 5

The third quartile of the given distribution is -0.5.

To find the third quartile of the given distribution, we need to find the value of x such that the cumulative distribution function (CDF) is equal to 0.75.

The CDF of the distribution is given as:

F(x) = {0, x < 0

1 - 10x²/100, 0 ≤ x < 10

1, x ≥ 10}

We can see that the CDF is defined piecewise, with different expressions for different ranges of x.

To find the third quartile, we need to find the value of x such that F(x) = 0.75.

For 0 ≤ x < 10, we have:

1 - 10x²/100 = 0.75

10x²/100 = 0.25

x² = 0.025

x = ±0.5

Since x<10, the only valid solution is x = -0.5.

Therefore, the third quartile of the given distribution is -0.5.

In summary, the third quartile of the given distribution is -0.5, and we found this by solving the equation F(x) = 0.75, where F(x) is the cumulative distribution function of the distribution.

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Answer:

4.5 centimeters

Step-by-step explanation:

For the triangle with area 144 square cm:

144 = (1/2)(6)x

144 = 3x, so x = 48 cm

So for the triangle with area 81 square cm:

(1/2)(x)(8x) = 81

4x^2 = 81

x^2 = 81/4 so x = 9/2 = 4.5 cm and

8x = 36 cm

Answer:

4.5

Step-by-step explanation:

The sum of the given infinite geometric series is 5/6 and is convergent.

The common ratio between any two consecutive terms in the series is -1/5. Since the absolute value of the common ratio is less than 1, the infinite geometric series is convergent.

for sum calculation use the formula below;

sum = a / (1 - r)

where a is the first term and r is the common ratio.

In this case, a = 1 and r = -1/5. So, the sum is:

sum = 1 / (1 - (-1/5)) = 1 / (6/5) = 5/6

Therefore, the sum of the given infinite geometric series is 5/6.

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The additional condition used to solve for all the coefficients of the cubic splines with natural end conditions is c)

To interpolate the given points. The natural end conditions imply that the second derivatives at the endpoints are zero, which provides two additional conditions.

Using these conditions and the five given points, we can solve for the coefficients of the cubic splines.

To be more specific, we need to find four cubic functions to describe the data between each pair of adjacent points.

Let's label these functions as S1, S2, S3, and S4 for the intervals [1, 2], [2, 3], [3, 4], and [4, 5], respectively.

Each cubic function has the form:

[tex]Si(x) = ai + bi(x - xi) + ci(x - xi)^2 + di(x - xi)^3[/tex]

where xi is the left endpoint of the ith interval and ai, bi, ci, and di are constants to be determined.

Using the natural end conditions, we know that S1''(1) = S4''(5) = 0. Therefore, we have two additional conditions to solve for the eight unknown coefficients: b1, c1, d1, a2, b2, c2, d2.

To determine these coefficients, we can use the five given data points and the following four conditions:

S1(1) = -1

S2(2) = 3

S3(4) = 0

S4(5) = 4

Using the conditions and the properties of the cubic splines, we can set up a system of linear equations and solve for the eight unknown coefficients.

Once we have determined these coefficients, we can write out the four cubic functions and use them to interpolate values between the given data points.

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(f) GCD(11111, 111111)

111111 = 10 × 11111 + 1

11111 = 1 × 11111 + 0

GCD(11111, 111111) = 1

(a) GCD(1, 5) = 1

1 = 5 × 0 + 1

5 = 1 × 5 + 0

(b) GCD(100, 101)

101 = 100 × 1 + 1

100 = 1 × 100 + 0

GCD(100, 101) = 1

(c) GCD(123, 277)

277 = 123 × 2 + 31

123 = 31 × 3 + 30

31 = 30 × 1 + 1

GCD(123, 277) = 1

(d) GCD(1529, 14038)

14038 = 9 × 1529 + 607

1529 = 2 × 607 + 315

607 = 1 × 315 + 292

315 = 1 × 292 + 23

292 = 12 × 23 + 16

23 = 1 × 16 + 7

16 = 2 × 7 + 2

7 = 3 × 2 + 1

GCD(1529, 14038) = 1

(e) GCD(1529, 14039)

14039 = 9 × 1529 + 28

1529 = 54 × 28 + 17

28 = 1 × 17 + 11

17 = 1 × 11 + 6

11 = 1 × 6 + 5

6 = 1 × 5 + 1

GCD(1529, 14039) = 1

(f) GCD(11111, 111111)

111111 = 10 × 11111 + 1

11111 = 1 × 11111 + 0

GCD(11111, 111111) = 1

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The solution of the equation m=h²kt²x is t = √(m/h²kx) for t>0.

A value or values which, when substituted for a variable in an equation, makes the equation true is known as a solution.

Also, to solve for some variable in an equation, just isolate that variable on one side of the equation.

To solve for t, we need to isolate it on one side of the equation m=h²kt²x.

We can start by dividing both sides by h²kx:

m/h²kx = t²

To solve for t, we need to take the square root of both sides.

However, we also know that t>0, so we need to take the positive square root:

t = √(m/h²kx)

Therefore, the solution for the indicated variable t is t = √(m/h²kx) for t>0.

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The contour lines closer to the origin

Let's start by understanding the equation given: y = f(x,t) = cos(t)sin(x)

Here, t represents time in milliseconds and x represents the distance in millimeters from the left end of the string. The function f(x,t) gives the displacement of the string at a given point (x,t) from its equilibrium position.

To graph the traces f(x,0) and f(x,pi/2), we need to fix the value of t and plot the function against x.

f(x,0) = cos(0)sin(x) = 0, as the displacement of the string is zero when t = 0.

f(x,pi/2) = cos(pi/2)sin(x) = sin(x), which gives us the displacement of the string at time t = pi/2 milliseconds.

The x-axis represents the distance from the left end of the string in millimeters, and the y-axis represents the displacement of the string in millimeters.

The trace f(x,0) represents the initial position of the string when it is at rest. The trace is a straight line at y=0, indicating that all points on the string are in their equilibrium positions.

The trace f(x,pi/2) represents the displacement of the string at time t = pi/2 milliseconds. It shows the shape of the string when it has completed a quarter of its vibration cycle. The curve starts at 0 when x = 0 and reaches a maximum displacement of 1 at x = pi/2. The curve then goes back to 0 at x = pi, indicating that the string has completed one cycle of vibration.

Now, let's graph the traces f(0,t) and f(pi/2,t):

f(0,t) = cos(t)sin(0) = 0, as the displacement of the string at x=0 is zero.

f(pi/2,t) = cos(t)sin(pi/2) = cos(t), which gives us the displacement of the string at time t for all points x = pi/2.

The x-axis represents time in milliseconds, and the y-axis represents the displacement of the string in millimeters.

The trace f(0,t) represents the displacement of the left end of the string, which is fixed at x=0. As expected, the trace is a straight line at y=0, indicating that the left end of the string remains stationary throughout the vibration cycle.

The trace f(pi/2,t) represents the displacement of the midpoint of the string, which is x=pi/2. The trace is a cosine curve, which indicates that the midpoint of the string oscillates back and forth between positive and negative displacements with a frequency of one cycle per millisecond.

The x-axis represents the distance from the left end of the string in millimeters, and the y-axis represents time in milliseconds. The contours represent the displacement of the string at a given point (x,t) from its equilibrium position.

The contour lines are labeled with the displacement values in millimeters. The contour lines closer to the origin

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The probability that fewer than 255 subjects in the sample will be infected is approximately 0.4730.

To find the probability that fewer than 255 of the subjects in the sample of 3200 will be infected, given that the virus infects 8 percent of the population, we can approximate this probability using the normal distribution. Follow these steps:

1. Calculate the mean(μ) and standard deviation (σ) of the binomial distribution.
  Mean (μ) = n * p = 3200 * 0.08 = 256
  Standard deviation (σ) = √(n * p * (1 - p)) = √(3200 * 0.08 * 0.92) ≈ 14.848

2. Convert the given value (255) to a z-score.
  z = (X - μ) / σ = (255 - 256) / 14.848 ≈ -0.067

3. Use a standard normal distribution table or calculator to find the probability for this z-score.
  P(Z < -0.067) ≈ 0.4730

So, the probability that fewer than 255 subjects in the sample will be infected is approximately 0.4730, or 47.30% when rounded to four decimal places.

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Answer:

12. John consumed 4 servings of pasta in this one meal. (2 cups / 0.5 cups per serving = 4 servings)

13. The clinic has a total of 2,500 Band-Aids in stock. (2,000 + 53 + 250 + 197 = 2,500 Band-Aids)

14. The three doctors evaluated a total of 65 patients. (23 + 25 + 17 = 65 patients)

15. The chiropractor spent a total of 1,170 minutes (19.5 hours) on direct patient care. (90 + 30 + 15 + 60 + 30 + 60 + 45 + 60 + 30 + 60 + 45 + 60 + 30 + 60 + 45 + 30 + 60 + 30 + 60 + 30 + 60 + 45 + 30 + 60 + 30 + 60 + 45 + 30 + 60 + 30 + 60 = 1,170 minutes; 1,170 / 60 = 19.5 hours)

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The area of the trapezoid that is given in the image below is calculated as: 62 square centimeters.

A trapezoid, like the one given in the image above, is a four-sided flat shape with one pair of parallel sides, and the parallel sides are called bases, while the other two sides are called legs. The area of trapezoid is given as:

A = 1/2 * (sum of the bases) * height

Given the following:

sum of bases = 10.4 + 7.9 + 6.5 = 24.8 cm

Height of trapezoid = 5 cm

Plug in the values:

Area of trapezoid (A) = 1/2 * 24.8 * 5

Area of trapezoid (A) = 62 square centimeters.

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The function "most_corr" takes in a DataFrame "df" that contains columns listed in "y" and "xes", where "xes" is a list of column names in "df" and "y" is the name of a column in "df".

The function returns the column name and Pearson's R correlation coefficient from "xes" that has the highest absolute correlation with "y". In other words, the function calculates the correlation coefficient between each column in "xes" and "y" and returns the name of the column with the highest absolute correlation coefficient.

The term "column" refers to the individual columns within the DataFrame, while "coefficient" refers to the Pearson's R correlation coefficient used to measure the strength of the correlation between two variables.

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The joint PDF of X_1 and X_2 is fx_1,x_2(x_1,x_2) = x_1×x_2/4 for 0 ≤ x_1 ≤ 2 and 0 ≤ x_2 ≤ 2.

To determine whether X and Y are independent, we need to check if their joint PMF can be expressed as the product of their marginal PMFs. Similarly, for Q and G, we need to check if their joint PMF can be expressed as the product of their marginal PMFs.

If the joint PMF of X and Y is not expressible in terms of the marginal PMFs, then we can conclude that X and Y are dependent. Similarly, if the joint PMF of Q and G is not expressible in terms of the marginal PMFs, then we can conclude that Q and G are dependent.

As for the joint PDF of X_1 and X_2, since they are independent and identically distributed, we can write:

fx_1,x_2(x_1,x_2) = fx(x_1) × fx(x_2)

= {x_1/2, 0 ≤ x_1 ≤ 2} × {x_2/2, 0 ≤ x_2 ≤ 2}

= {x_1×x_2/4, 0 ≤ x_1 ≤ 2, 0 ≤ x_2 ≤ 2}

Therefore, the joint PDF of X_1 and X_2 is fx_1,x_2(x_1,x_2) = x_1×x_2/4 for 0 ≤ x_1 ≤ 2 and 0 ≤ x_2 ≤ 2.

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