in the linear trend equation, ft k = at bt*k, the term that signifies the trend is:

The general solution of this differential equation is y(t) = c1 cos(5t) + c2 sin(5t), where c1 and c2 are constants determined by the initial conditions.

Differentiating the second equation with respect to t, we get: d^2y/dt^2 = -5 dx/dt, Substituting dx/dt from the first equation, we get: d^2y/dt^2 = -5(-5y) = 25y.

This is a second order differential equation in y. The general solution of this differential equation is y(t) = c1 cos(5t) + c2 sin(5t), where c1 and c2 are constants determined by the initial conditions.

To find x as a function of t, we can substitute y(t) into the first equation and solve for x: dx/dt = -5y = -5(c1 cos(5t) + c2 sin(5t)) , Integrating both sides with respect to t, we get: x(t) = -c1 sin(5t) + c2 cos(5t) + k

where k is a constant of integration. Using the initial conditions x(0) = 4 and y(0) = 1, we can solve for the constants c1, c2, and k: x(0) = -c1 sin(0) + c2 cos(0) + k = c2 + k = 4, y(0) = c1 cos(0) + c2 sin(0) = c1 = 1

Substituting c1 = 1 and c2 + k = 4 into the equation for x, we get:

x(t) = -sin(5t) + 4

So the solution to the system of differential equations with initial conditions x(0) = 4 and y(0) = 1 is x(t) = -sin(5t) + 4 and y(t) = cos(5t).

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Based on the characteristics of the line and parabola, the correct answer is:

A. [tex]\(y = \begin{cases} x^2 + 2, & x \leq 1 \\ -x + 2, & x > 1 \end{cases}\)[/tex]

Based on the given information, let's analyze the characteristics of the line and parabola to determine the correct representation:

1. Line: In the context of graphing, a line appears as a straight line that can extend in any direction across the coordinate plane. It can have a positive or negative slope, or be horizontal or vertical.

- The line passes through the points [tex](1,1), (2,0), (4,-2), and (8,-6).[/tex]

- It extends along the first and fourth quadrants.

- A closed dot is shown at the point (1,1).

2. Parabola: In the context of graphing, a parabola appears as a curved line. It can open upward or downward and can be concave or convex. The vertex of the parabola represents the lowest or highest point on the curve, and the axis of symmetry is a vertical line that passes through the vertex, dividing the parabola into two symmetric halves.

- The parabola passes through the points [tex](1,3), (-2,6), and (10,-3).[/tex]

- It extends along the first and second quadrants.

- An open dot is shown at the point (1,3).

- The vertex of the parabola lies at (0,2).

Given these characteristics, we can determine the correct representation:

The correct answer is:

A. [tex]\(y = \begin{cases} x^2 + 2, & x \leq 1 \\ -x + 2, & x > 1 \end{cases}\)[/tex]

Explanation: The equation [tex]\(y = x^2 + 2\)[/tex] represents the parabola, and the equation [tex]\(y = -x + 2\)[/tex] represents the line. The closed dot at (1,1) corresponds to the parabola, and the open dot at (1,3) corresponds to the line.

Therefore, the correct answer is A.

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The scale factor from ABC to DEF is 2/5

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

The triangles

From the triangles, we have the following parameters

Side length of ABC = 40

Corresponding side length of DEF = 16

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

Scale factor of the dilation = Corresponding side length of DEF / Side length of ABC

So, we have

Scale factor of the dilation = 16/40

Evaluate

Scale factor of the dilation = 2/5

Hence, the scale factor of the dilation is 2/5

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There are 330 ways the coach can select a batting order of seven players from an 11 person team.

To determine the number of ways the coach can select a batting order of seven players from an 11 person team, we can use the combination formula, which is given by:

nCr = n! / r!(n-r)!

where n is the total number of players on the team, and r is the number of players in the batting order. In this case, n = 11 and r = 7.

So, the number of ways the coach can select a batting order of seven players from an 11 person team can be calculated as follows:

11C₇ = 11! / (7!(11-7)!)

= (11 x 10 x 9 x 8) / (4 x 3 x 2 x 1)

= 330

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The mass of Stewart's favorite frying pan in grams is 520 grams.

To convert the mass of Stewart's favorite frying pan from kilograms to grams, you simply need to multiply the mass in kilograms by 1000, since there are 1000 grams in 1 kilogram. In this case, the mass of the frying pan is 0.52 kilograms. To find the mass in grams, you can perform the following calculation:
0.52 kg × 1000 g/kg = 520 g
So, the mass of Stewart's favorite frying pan in grams is 520 grams.

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The general solution of the differential equation
y''(t) = 28e^(4t)sin(6t) is y(t) = c1e^(4t)sin(6t) + c2e^(4t)cos(6t).

To find the general solution of the differential equation
y''(t) = 28e^(4t)sin(6t), we can solve the homogeneous equation y''(t) = 0 and then find a particular solution for the non-homogeneous equation.

The homogeneous equation is y''(t) = 0, which has the general solution y(t) = c1 + c2t, where c1 and c2 are arbitrary constants.

To find a particular solution for the non-homogeneous equation, we can use the method of undetermined coefficients. Since the non-homogeneous term is of the form e^(4t)sin(6t), we can assume a particular solution of the form y_p(t) = Ate^(4t)sin(6t) + Bte^(4t)cos(6t). After taking the first and second derivatives, we can substitute them back into the original equation and solve for the coefficients A and B.
We obtain A = -7/200 and B = 3/100.

Therefore, the general solution of the differential equation
y''(t) = 28e^(4t)sin(6t) is y(t) = c1e^(4t)sin(6t) + c2e^(4t)cos(6t) - (7/200)te^(4t)sin(6t) + (3/100)te^(4t)cos(6t), where c1 and c2 are arbitrary constants.

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A footrest is also called a pedal. It is a device used in various vehicles and machinery to provide a place to rest or support your feet while operating.

In some vehicles, particularly older models or certain types of cars, there might be a footrest positioned to the left of the driver's foot pedals (accelerator, brake, and clutch). This left footrest is designed to provide additional comfort and support for the left foot when it is not actively engaged in operating the pedals.

The purpose of the left footrest is primarily for ergonomic reasons, allowing the driver to maintain a relaxed and comfortable position during extended drives or when the left foot is not actively required for driving tasks.

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The equation of the tangent to the curve at the given point. x = 7 sin(t), y = t2 t, (0, 0) is y = 0, To find the equation of the tangent to the curve at the given point (0, 0), we first need to find the derivative of x and y with respect to t, and then find the slope of the tangent at the given point.

Given: x = 7sin(t), y = t^2

Find dx/dt and dy/dt:
dx/dt = 7cos(t)
dy/dt = 2t

Now, find the slope of the tangent at the point (0, 0) by dividing dy/dt by dx/dt:

Slope = (dy/dt) / (dx/dt) = (2t) / (7cos(t))

At t = 0, the slope is:
Slope = (2*0) / (7cos(0)) = 0 / 7 = 0

Now we use the point-slope form of the equation to find the equation of the tangent line:

y - y1 = slope * (x - x1)

Since the point is (0, 0) and the slope is 0, the equation becomes:

y - 0 = 0 * (x - 0)

Simplifying, we get the equation of the tangent line as:

y = 0

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The critical value that should be used in constructing the confidence interval is 1.645.

Given that the sample size is 20, the degree of freedom is 19.

We have to look up the value in a standard normal probability table or a t-distribution table with degrees of freedom n-1 to find the critical value for a 90% confidence interval.

Since the sample size is large (n > 30), we can use the standard normal distribution instead of the t-distribution.

Using a standard normal probability table,

The critical value for a 90% confidence interval is 1.645.

Therefore, the critical value that should be used in constructing the confidence interval is 1.645, rounded to three decimal places.

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Answer:

  B, C

Step-by-step explanation:

You want the listed values of x that satisfy both inequalities 30 > x and x > 15.

When we have both inequality symbols pointing left, we can write these two inequalities as ...

  15 < x < 30

That is, x may be any integer in the range 16 to 29, inclusive. Answer choices in that range are ...

  B.  x = 22

  C.  x = 29

Answer:

11.5

Step-by-step explanation:

65=10x-50
+50.     +50
=115=10x

We can rewrite x = 4 sec a in terms of sine and cosine as x = 4/cos(a) = 4(1/cos(a)) = 4/[(1-sin^2(a))^0.5].

To understand why we can rewrite secant as a combination of sine and cosine, we can start with the definition of the secant function. The secant of an angle a is defined as the reciprocal of the cosine of a, or sec(a) = 1/cos(a). Using the Pythagorean identity, 1 = sin^2(a) + cos^2(a), we can solve for cos(a) to get cos(a) = (1 - sin^2(a))^0.5. Substituting this into the definition of secant, we get sec(a) = 1/[(1 - sin^2(a))^0.5]. Finally, multiplying both the numerator and denominator by 4, we get x = 4/[(1 - sin^2(a))^0.5], which is the desired form of x in terms of sine and cosine.

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The length of the curve is:

[tex]=\frac{(68)^\frac{3}{2}-8 }{3}[/tex]

Using the arc length formula in terms of polar coordinates [tex]\int\limits\sqrt{r^2+(\frac{dr}{d\theta})^2 }[/tex]

To find the length of the curve we will use the formula:

[tex]\int\limits\sqrt{r^2+(\frac{dr}{d\theta})^2 }[/tex]

Now, Let us put it in the expression:

[tex]r = \theta^2\\\\\frac{dr}{d\thera} =2\theta[/tex]

Now the integral becomes:

[tex]=\int\limits^8_0 \sqrt{(\theta)^4+(2\theta)^2} \, d\theta\\ \\=\int\limits^8_0\theta \sqrt{(\theta)^2+4} \, d\theta\\[/tex]

Now using the substitution method:

[tex]\theta^2+4=t\\\\2\thetad\theta=dt\\\\=\int\limits\frac{\sqrt{t}dt }{2}\\ \\=\frac{t^\frac{3}{2} }{3}\\ \\=\frac{(\theta^2+4)^\frac{3}{2} }{3}[/tex]

Now, Let us plug in the values:

[tex]=\frac{(68)^\frac{3}{2}-8 }{3}[/tex]

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To calculate the number of arrangements of the given letters (aabbccdefg) with no pair of consecutive letters the same, we can use the concept of permutations with restrictions.

Let's consider the letters a, b, c, d, e, f, and g as distinct elements. We need to arrange these elements in such a way that no two consecutive letters are the same.

We can start by arranging the distinct elements (a, b, c, d, e, f, g) in a line, which can be done in 7! (7 factorial) ways.

Now, we need to consider the arrangements where the same letters are together. In this case, we have two pairs of repeated letters: (a, a) and (b, b).

We can treat each pair as a single entity. So, we have 6 elements to arrange: (aabb, c, d, e, f, g).

The 6 elements can be arranged in 6! ways.

Therefore, the total number of arrangements is 7! * 6!.

Note: If the repeated letters were not together, we would have to consider more cases and the calculation would be more complex.

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To find the percentage, we can use the formula: (part/whole) x 100%. In this case, the part is 10.8 and the whole is 240. So, substituting these values in the formula, we get (10.8/240) x 100% = 4.5%. Therefore, 10.8 is 4.5% of 240. To round to four decimal places, we can keep the first four digits after the decimal point, which gives us 4.5000%.

To find what percent of 240 is 10.8, follow these steps:

Step 1: Write the problem as a proportion using the given values.
x% = (10.8 / 240)

Step 2: Convert the percentage to a decimal by dividing x by 100.
x/100 = (10.8 / 240)

Step 3: Solve for x by cross-multiplying.
100 * 10.8 = 240 * x

Step 4: Divide both sides by 240 to isolate x.
x = (100 * 10.8) / 240

Step 5: Calculate the value of x.
x = 1080 / 240

Step 6: Simplify the fraction and, if necessary, round to four decimal places.
x = 4.5000

Therefore, 10.8 is approximately 4.5000% of 240.

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The words that describe probability that he will land on white is impossible. The Option D.

Probability is math branch that deals with finding out the likelihood of the occurrence of an event.

Here, the spinner is divided into four equal-sized sections, the probability of landing on any specific color will be:

= Either of red, green, yellow or blue / 4

= 1/4.

it is mentioned that if Luke lands on a line between the colors, he keeps spinning until he lands on a color. This means that there is no chance of landing on white directly.

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To find the interval of convergence for the power series.  In other words, the power series converges for all values of x.

∑n=1∞ (x-4)^n / n*(-5)^n

we can use the ratio test:

lim┬(n→∞)⁡|a_(n+1)/a_n|

=lim┬(n→∞)⁡|(x-4)/(n+1)(-5/n)|

= lim┬(n→∞)⁡|(x-4)(-5)/(n+1)n|

= |-5(x-4)| * lim┬(n→∞)⁡1/(n+1)

= |-5(x-4)| * 0

The series will converge if the limit is less than 1 and diverge if the limit is greater than 1. Therefore, we need to solve the inequality:

|-5(x-4)| * 0 < 1

which simplifies to:

|x-4| > 0

Thus, the interval of convergence is (4 - ∞, 4 + ∞) or (-∞, ∞) in interval notation.

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Therefore, the component form of vector v is (7.7551, 2.0664) (rounded to four decimals).

To find the component form of a vector v given its magnitude and the angle it makes with the positive x-axis, we can use trigonometric functions to determine the x-component (v_x) and y-component (v_y) of the vector. In this case, we are given the magnitude of the vector ‖v‖ = 8 and the angle θ = 15°. The formulas for finding the components are:

v_x = ‖v‖ * cos(θ)

v_y = ‖v‖ * sin(θ)

Plugging in the given values, we have:

v_x = 8 * cos(15°)

v_y = 8 * sin(15°)

By evaluating these trigonometric functions, we can calculate the values:

v_x ≈ 8 * cos(15°) ≈ 7.7551

v_y ≈ 8 * sin(15°) ≈ 2.0664

These values represent the x-component and y-component of the vector v, respectively. So, the component form of vector v is approximately (7.7551, 2.0664) (rounded to four decimals).

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To guarantee to select at least one odd integer, pick one from {1,3,5,...,2n-1}. To guarantee at least one even integer, pick two from {0,2,4,...,2n}.

To be sure of getting at least one odd integer, you need to pick just one integer from the set {1,3,5,...,2n-1}. Any integer in this set is odd, so selecting just one integer guarantees that you will get an odd integer.

On the other hand, to be sure of getting at least one even integer, you need to pick two integers from the set {0,2,4,...,2n}. If you pick only one integer from this set, it could be an odd integer, which means you didn't get an even integer. But if you pick two integers, at least one of them must be even. This is because if you pick two odd integers, their sum will be even, and if you pick an even integer and an odd integer, their sum will be odd.

In summary, to be sure of getting at least one odd integer, you need to pick one integer from {1,3,5,...,2n-1}, and to be sure of getting at least one even integer, you need to pick two integers from {0,2,4,...,2n}.

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a) 1.. Transactions motive or Md

2. Speculative motive or Md

3. Precautionary motive or Md

b) Money × Velocity = Price × Transactions or, M × V = P × T.

c) Impact velocity support at the moment of impact.

a) The three motives of money demand according to Keynes are:

1.. Transactions motive or Md

2. Speculative motive or Md

3. Precautionary motive or Md

b) The more money they need for such transactions, the more money they hold. The relation between transactions and money is expressed in equation, called the quantity equation:

Money × Velocity = Price × Transactions or, M × V = P × T.

c) The velocity of money is a measurement of the rate at which money is exchanged in an economy. It is the number of times that money moves from one entity to another. Impact velocity is the velocity of the striker relative to the support at the moment of impact.

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In order to construct a confidence interval for the population mean when the population standard deviation is known, two assumptions must be met. Firstly, the sample data must be a simple random sample from the population being studied.

Secondly, the variable being measured must have a normal distribution or the sample size must be sufficiently large. The first assumption of a simple random sample ensures that the sample is representative of the population being studied, which is necessary for valid statistical inference. The second assumption is necessary because the confidence interval calculation relies on the assumption that the sample mean follows a normal distribution. When the variable being measured has a normal distribution, the sample mean will also have a normal distribution regardless of the sample size. When the variable being measured does not have a normal distribution, the sample size must be large enough (typically at least 30) in order for the sample mean to follow a normal distribution due to the central limit theorem. By meeting these two assumptions, we can be confident in the accuracy of the resulting confidence interval for the population mean.

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The correct explicit formula for the nth term of the arithmetic sequence is given as follows:

[tex]a_n = 78 - 12.5(n - 1)[/tex]

An arithmetic sequence is a sequence of values in which the difference between consecutive terms is constant and is called common difference d.

The nth term of an arithmetic sequence is given by the explicit formula presented as follows:

[tex]a_n = a_1 + (n - 1)d[/tex]

The first term of the sequence in this problem is given as follows:

[tex]a_1 = 78[/tex]

Each term is the previous term subtracted by 12.5, hence the common difference is given as follows:

d = -12.5.

Hence the formula for the nth term is given as follows:

[tex]a_n = 78 - 12.5(n - 1)[/tex]

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Answer:

Step-by-step explanation:

2.807 km × 3280.84 ft/km ≈ 9203.2 ft

Rounding this to the nearest foot, we get:

The amount of fencing needed to enclose the semi-circle is approximately 9203 feet.

A. The perimeter of the figure is [tex]\(63\sqrt{6}\) cm[/tex].

B. The area of the figure is [tex]\(540 \, \text{cm}^2\)[/tex].

Given the dimensions of the figure below, we can calculate the perimeter and area.

The figure is a right triangle with a height of [tex]\(15\sqrt{6}\) cm[/tex], a base of [tex]\(6\sqrt{24}\) cm[/tex], and a hypotenuse of [tex]\(12\sqrt{54}\) cm[/tex].

To find the perimeter (P), we sum the lengths of all sides:

[tex]\[P = \text{base} + \text{height} + \text{hypotenuse}\][/tex]

Substituting the given values:

[tex]\[P = 6\sqrt{24} + 15\sqrt{6} + 12\sqrt{54}\][/tex]

To simplify the expression, we can evaluate the square roots:

[tex]\[P = 6\sqrt{4 \cdot 6} + 15\sqrt{6} + 12\sqrt{9 \cdot 6}\]\[P = 6 \cdot 2\sqrt{6} + 15\sqrt{6} + 12 \cdot 3\sqrt{6}\]\[P = 12\sqrt{6} + 15\sqrt{6} + 36\sqrt{6}\]\[P = 63\sqrt{6}\][/tex]

The perimeter of the figure is [tex]\(63\sqrt{6}\) cm.[/tex]

To find the area (A) of the right triangle, we can use the formula:

[tex]\[A = \frac{1}{2} \times \text{base} \times \text{height}\][/tex]

Substituting the given values:

[tex]\[A = \frac{1}{2} \times 6\sqrt{24} \times 15\sqrt{6}\][/tex]

Simplifying the expression:

[tex]\[A = 3\sqrt{4 \cdot 6} \times 15\sqrt{6}\]\[A = 3 \cdot 2\sqrt{6} \times 15\sqrt{6}\]\[A = 6\sqrt{6} \times 15\sqrt{6}\]\[A = 90 \times 6\]\[A = 540\][/tex]

The area of the figure is [tex]\(540 \, \text{cm}^2\)[/tex].

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The probability that the white ball was drawn from urn 1 given that a white ball was drawn is approximately 0.654. Here we use Bayes' theorem P(A|B) = P(B|A) * P(A) / P(B).

Let A be the event that urn 1 was chosen, and B be the event that a white ball was drawn. We want to find P(A|B), the probability that urn 1 was chosen given that a white ball was drawn. Using Bayes' theorem, we have:

P(A|B) = P(B|A) * P(A) / P(B)

where P(B|A) is the probability of drawing a white ball given that urn 1 was chosen, P(A) is the probability of choosing urn 1, and P(B) is the probability of drawing a white ball (regardless of which urn was chosen).

We can compute these probabilities as follows:

P(B|A) = 3/8 (since urn 1 has 3 white balls out of 8 total balls)

P(A) = 1/2 (since each urn is equally likely to be chosen)

P(B) = P(B|A) * P(A) + P(B|A') * P(A') = (3/8 * 1/2) + (1/4 * 1/2) = 5/16

where A' is the event that urn 2 was chosen.

Plugging these values into Bayes' theorem, we get:

P(A|B) = (3/8 * 1/2) / (5/16) = 0.654

Therefore, the probability that the white ball was drawn from urn 1 given that a white ball was drawn is approximately 0.654.

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The temperature 38 degrees below zero as an integer is -38.

A graph that shows the line of best fit for the data include the following: B. graph B.

In Mathematics and Statistics, there are different characteristics that are used for determining the line of best fit on a scatter plot and these include the following:

By critically observing the scatter plots using the aforementioned characteristics, we can reasonably infer and logically deduce that scatter plot B or graph B best models the relationship between the data because the end points would be equally divided on both sides of the line with a positive slope and a y-intercept of 8.

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However, you can plug in the values into the formula in step 4 to find the probability.

To find the probability that in a random sample of adults, more than 0 do not own a credit card, follow these steps:
1. Determine the probability of a single adult not owning a credit card (P(no credit card)).
2. Calculate the complementary probability, which is the probability that an adult does own a credit card (P(credit card) = 1 - P(no credit card)).
3. For a random sample of n adults, determine the probability that all n adults own a credit card. This is given by (P(credit card))^n.
4. Finally, to find the probability that more than 0 adults in the sample do not own a credit card, calculate the complementary probability: 1 - (P(credit card))^n.
Without specific values for the probability of not owning a credit card and the sample size, I cannot provide a numerical answer. However, you can plug in the values into the formula in step 4 to find the probability.

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To solve 4222 - 2451 using the left-to-right algorithm, we start with the thousands place and subtract 2 from 4, which gives us 2. Then we move to the hundreds place and realize that we cannot subtract 4 from 2, so we need to borrow from the thousands place.

We start by subtracting the thousands place digits, then the hundreds, the tens, and finally the ones.

Starting with the thousands place, we have:

4 - 2 = 2

So we write down 2 as the leftmost digit of the answer.

Moving to the hundreds place, we have:

2 - 4 = -2

Since we cannot subtract 4 from 2, we need to "borrow" from the thousands place. We can do this by subtracting 1 from the 2 in the thousands place, making it a 1, and adding 10 to the hundreds place, making it 12.

Now we have:

12 - 4 = 8

So we write down 8 as the second digit of the answer.

Moving to the tens place, we have:

2 - 5 = -3

Again, we need to borrow. We can subtract 1 from the 1 in the thousands place, making it 0, and add 10 to the tens place, making it 12.

Now we have:

12 - 5 = 7

So we write down 7 as the third digit of the answer.

Finally, we move to the ones place:

2 - 1 = 1

So we write down 1 as the last digit of the answer.

Putting it all together, we have:

4222 - 2451 = 1771

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The height of the tower is 969 feet.

Let CD be the tower and A be the point from a window in the building, a person determines that the angle of elevation to the top of the tower is 42 degrees.

In triangle AED

tan42° = ED/AE

tan42° = h₁/615

h₁ = tan42° × 615

= 553.74

Rounding to the nearest integer

h₁ = 554

In triangle AEC

tan34° = EC/AE

tan34° = h₂/615

h₂ = tan34° × 615

= 414.82

Rounding to the nearest integer

h₂ = 415

Height of tower = EC + ED

= h₁ + h₂

= 554 + 415

= 969

Therefore, the height of the tower is 969 feet.

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