choose the expression that best completes this sentence: the function f(x) = ________________ has a local minimum at the point (8,0). a) x−8 b) (x−8)−1 c) x2−16x 64 d) −|x−8| e) (x−8)13

The 70th percentile of current measurement is 11.05 milliamperes.

To find the 70th percentile of the current measurement, we need to find the value of the current measurement that separates the lowest 70% of measurements from the highest 30% of measurements.

We can use a standard normal distribution table or a calculator to find the z-score that corresponds to the 70th percentile, which is 0.5244.

Then we can use the formula:

x = μ + zσ

where x is the value of the current measurement, μ is the mean of the distribution, σ is the standard deviation, and z is the z-score corresponding to the 70th percentile.

Plugging in the values, we get:

x = 10 + 0.5244(2) = 11.05

Therefore, the 70th percentile of current measurement is 11.05 milliamperes.

So, the answer is 11.05.

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The gardener will need to purchase an additional 6 1/2 ft of fencing to complete his square garden for his flowers.

You want to know how much more fencing the gardener will need to purchase if he already has 4 1/2 ft of fencing and

the length of one side of the square garden is 2 3/4 ft.

Since the garden is square, all sides have the same length. We know one side is 2 3/4 ft.

Multiply the length of one side (2 3/4 ft) by 4 to find the total amount of fencing needed for the entire garden:

2 3/4 × 4 = 11 ft.

Now, subtract the amount of fencing the gardener already has (4 1/2 ft) from the total amount needed (11 ft):

11 - 4 1/2 = 6 1/2 ft.

So, the gardener will need to purchase an additional 6 1/2 ft of fencing to complete his square garden for his flowers.

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The Laplace transform of the following functions are: a. (112s + 16)/s; b. (5s^2 + 20s + 10e^-2s - 20)/s(s+2)^2; c. (10s - 40)/(s^2 + 400)(s+4); d. 1.5/s^2 - 1.5e^(-10s)/s^2 + 150/s; e. 1.5/s^2 - 1.5e^(-10s)/s^2 + 15/s - 15e^(-10s)/s; f. 1.5/s^2 - 1.5e^(-10s)/s^2 + 30/(s+15); g. e^(-3s) * (-1/s^2 + 2/s); h. 6/(s+2) * (1/(s+11)).

The Laplace transform of the following functions are:

a. L{a(t)} = 28L{δ(t)} + 3L{1} + 4L{u(t)}

= 28 + 3s + 4(1/s)

= (112s + 12 + 4)/s

= (112s + 16)/s

b. L{b(t)} = 5L{1} - 5L{e-2t(1 + 2t)}

= 5/s - 5L{e-2t}L{1 + 2t}

= 5/s - 5/(s + 2)^2 * (1 + 2/s)

= (5s^2 + 20s + 10e^-2s - 20)/s(s+2)^2

c. L{c(t)} = 10L{e-4t}L{cos(20t+36.99)}

= 10/(s+4) * [s/(s^2 + 400) - 4/(s^2 + 400)]

= (10s - 40)/(s^2 + 400)(s+4)

d. L{d(t)} = 1.5L{tu(t)} - 1.5L{(t-100)u(t-10)}

= 1.5(1/s^2) - 1.5e^(-10s)(1/s^2 - 100/s)

= 1.5/s^2 - 1.5e^(-10s)/s^2 + 150/s

e. L{f(t)} = 1.5L{tu(t)} - 1.5L{(t-10)u(t-10)} - 15L{u(t-10)}

= 1.5(1/s^2) - 1.5e^(-10s)(1/s^2 - 10/s) - 15e^(-10s)/s

= 1.5/s^2 - 1.5e^(-10s)/s^2 + 15/s - 15e^(-10s)/s

f. L{g(t)} = 1.5L{tu(t)} - 1.5L{(t-10)u(t-10)} - 3L{(t-15)u(t-15)}

= 1.5(1/s^2) - 1.5e^(-10s)(1/s^2 - 10/s) - 3e^(-15s)(1/s)

= 1.5/s^2 - 1.5e^(-10s)/s^2 + 30/(s+15)

g. L{h(t)} = L{(t+2)u(t-3)}

= e^(-3s) * L{(t+2)}

=  e^(-3s) * (-1/s^2 + 2/s)

h. L{j(t)} = 6L{e^(-2t)}L{e^(11u(t-5))}

= 6/(s+2) * L{e^(11u(t-5))}

= 6/(s+2) * L{e^(11u(t-5))}

= 6/(s+2) * (1/(s+11))

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The individual linearizations of f(x) and f'(x) at x0 are combined to obtain the linearization of f(x) at x0.

To find the linearization of a function f(x) at a point x0, we use the following formula:

L(x) = f(x0) + f'(x0)(x - x0)

where f'(x0) represents the derivative of f(x) evaluated at x0.

The linearization of f(x) at x0 is an approximation of the function near x0, where the approximation is a linear function. It is related to the individual linearizations of f(x) and f'(x) at x0 in the following way:

The linearization of f(x) at x0 is a linear function that approximates f(x) near x0. It can be seen as the "best" linear approximation of f(x) near x0.

The linearization of f'(x) at x0 is a constant value that represents the slope of the tangent line to f(x) at x0. This constant value is also known as the instantaneous rate of change of f(x) at x0.

The linearization of f(x) at x0 can be obtained by combining the constant value f(x0) and the linear function f'(x0)(x - x0). The linear function represents the change in f(x) as x moves away from x0, while the constant value f(x0) represents the value of f(x) at x0.

Therefore, the individual linearizations of f(x) and f'(x) at x0 are combined to obtain the linearization of f(x) at x0.

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The exact angles in radians and in the interval π/6 [0, π] are:

[tex]cos^{-1}[/tex](-√(3)/2) = 7π/6

[tex]cos^{-1}[/tex](0) = π/2

[tex]cos^{-1}[/tex](√(2)/2) = π/4

The cosine inverse function, also known as the arccosine function, is the inverse function of the cosine function. It takes a value between -1 and 1 and returns the corresponding angle between 0 and π (or 0 and 180 degrees) whose cosine is that value. The notation for the cosine inverse function is cos⁻¹ or arccos.

For example, cos⁻¹(1/2) = π/3, since the cosine of π/3 is 1/2.

[tex]cos^{-1}[/tex](-√(3)/2) is in the second quadrant where cosine is negative. Using the unit circle, we can see that this angle is π/6 + pi = 7π/6.

[tex]cos^{-1}[/tex](0) is in the first and second quadrants where cosine is 0. This means the possible angles are π/2 and 3π/2. However, since we are only considering angles in the interval pi/6 [0, pi], the answer is π/2.

[tex]cos^{-1}[/tex](√(2)/2) is in the first quadrant where cosine is positive. Using the unit circle, we can see that this angle is π/4.

Therefore, the exact angles in radians and in the interval π/6 [0, pi] are:

[tex]cos^{-1}[/tex](-√(3)/2) = 7π/6

[tex]cos^{-1}[/tex](0) = π/2

[tex]cos^{-1}[/tex](√(2)/2) = π/4

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The exact angles in radians and in the interval π/6 [0, π] are:

[tex]cos^{-1}[/tex](-√(3)/2) = 7π/6

[tex]cos^{-1}[/tex](0) = π/2

[tex]cos^{-1}[/tex](√(2)/2) = π/4

The cosine inverse function, also known as the arccosine function, is the inverse function of the cosine function. It takes a value between -1 and 1 and returns the corresponding angle between 0 and π (or 0 and 180 degrees) whose cosine is that value. The notation for the cosine inverse function is cos⁻¹ or arccos.

For example, cos⁻¹(1/2) = π/3, since the cosine of π/3 is 1/2.

[tex]cos^{-1}[/tex](-√(3)/2) is in the second quadrant where cosine is negative. Using the unit circle, we can see that this angle is π/6 + pi = 7π/6.

[tex]cos^{-1}[/tex](0) is in the first and second quadrants where cosine is 0. This means the possible angles are π/2 and 3π/2. However, since we are only considering angles in the interval pi/6 [0, pi], the answer is π/2.

[tex]cos^{-1}[/tex](√(2)/2) is in the first quadrant where cosine is positive. Using the unit circle, we can see that this angle is π/4.

Therefore, the exact angles in radians and in the interval π/6 [0, pi] are:

[tex]cos^{-1}[/tex](-√(3)/2) = 7π/6

[tex]cos^{-1}[/tex](0) = π/2

[tex]cos^{-1}[/tex](√(2)/2) = π/4

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An advantage of using graphs and diagrams is B. They help to visualize the problem.

Graphs and diagrams are pictorial representations of data.

Graphs represent information using lines on two or three axes such as x, y, and z.

On the other hand, diagrams show the simple pictorial representation of what a thing looks like or how it works.

Graphs are scaled while diagrams may not be scaled.

Thus, we use graphs and diagrams to visualize data and information.

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cut shape into two which is triangle and a trapezium use to formulas of the identified shapes in solving the area

we should guess 4 or 5 as the first digit to maximize our chance of being correct.

The graph below shows the approximate probabilities for n = 1 to 10.

we find that this occurs when n is approximately 65.

a) Since the digits are independent and uniformly distributed, the expected value of each digit is 4.5.

Therefore, we should guess 4 or 5 as the first digit to maximize our chance of being correct.

b) For n = 1, there is a 10% chance of guessing correctly. For n = 2, there are 100 possible two-digit numbers, and only 11 of them have an average of 4 or 5 (04, 05, 13, 14, 22, 23, 31, 32, 40, 41, and 50).

Therefore, the chance of guessing correctly is 11/100 or 11%. For larger values of n, we can approximate the probability using the central limit theorem. The distribution of Dn approaches a normal distribution with mean 4.5 and standard deviation sqrt(8.25/n). Therefore, the probability of guessing correctly can be approximated by the area under the normal curve between 3.5 and 5.5. The graph below shows the approximate probabilities for n = 1 to 10.

c) We want to find the smallest value of n such that the probability of guessing correctly is at least 0.99. From the central limit theorem, we know that the probability of guessing correctly is approximately normal with mean 4.5 and standard deviation sqrt(8.25/n).

Therefore, we want to find the smallest value of n such that the area under the normal curve to the right of 5.5 is at least 0.01. Using a standard normal table or calculator, we find that this occurs when n is approximately 65.

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The required volume of the solid region f is :

64/3 cubic units.

To find the volume of the solid region f bounded by the two parabolic cylinders z = 16 − y2 and z = 16 − x2 in the first octant, we need to set up a triple integral over the region f.

We can integrate over the x, y, and z coordinates, with the limits of integration as follows:

0 ≤ x ≤ 4
0 ≤ y ≤ 4
16 − y2 ≤ z ≤ 16 − x2

The limits for x and y are simply the boundaries of the first octant. The limits for z are given by the two equations of the parabolic cylinders, with the lower limit being the curve z = 16 − y2 and the upper limit being the curve z = 16 − x2.

Therefore, the volume of the solid region f is given by:

∫∫∫ f dV = ∫∫∫ 1 dV

Where f = 1, since we are integrating over a solid region with a constant density of 1.

Using the limits of integration above, we can evaluate the triple integral as follows:

∫0^4 ∫0^4 ∫16−y^2^16−x^2 1 dz dy dx

= ∫0^4 ∫0^4 [16 − y2 − (16 − x2)] dy dx

= ∫0^4 ∫0^4 (x2 − y2) dy dx

= ∫0^4 [(x2y − y3/3)]0^4 dx

= ∫0^4 (4x2) dx

= [4x3/3]0^4

= 64/3 cubic units.

Therefore, the volume of the solid region f is 64/3 cubic units.

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The area of the region that lies inside the first curve and outside the second curve. r = 3 − 3 sin(), r = 3 is 9π/2.

The two polar curves given are:

r1 = 3 - 3sin(θ)

r2 = 3

The region that lies inside the first curve and outside the second curve is the region bounded by these two curves. To find the area of this region, we need to integrate the area element over the region.

The area element in polar coordinates is given by dA = r dr dθ. Therefore, the area of the region can be computed as:

A = ∫θ1^θ2 ∫r2^r1 r dr dθ

where θ1 and θ2 are the angles at which the two curves intersect.

To find the intersection points, we set the two equations equal to each other:

3 - 3sin(θ) = 3

Simplifying, we get:

sin(θ) = 0

which implies that θ = 0 or θ = π.

Therefore, the integral becomes:

A = ∫0^π ∫3-3sin(θ)^3 r dr dθ

= ∫0^π [(1/2)r^2]_3-3sin(θ) dθ

= (1/2) ∫0^π (9 - 18sin(θ) + 9sin(θ)^2) dθ

= (1/2) [9θ + 6cos(θ) - 9sin(θ)]_0^π

= 9π/2

Therefore, the area of the region that lies inside the first curve and outside the second curve is 9π/2.

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The correct answer is gcd(Greatest common divisor)  and lcm(least common multiple) of 1000 and 625.

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Answer:

b

Step-by-step explanation:

The values of dy and δy for the function y=e3x 5x given x=0 and δx=dx=0.03 are:
dy = 0.6
δy = 0.6

To compute the values of dy and δy for the function y=e3x 5x given x=0 and δx=dx=0.03, we need to use the formula for the total differential of a function:

dy = (∂y/∂x)dx

where ∂y/∂x is the partial derivative of y with respect to x.

In this case, we have:

y = e3x 5x

∂y/∂x = 3e3x 5x + e3x 5

At x=0, this becomes:

∂y/∂x = 3(1) 5 + (1) 5 = 20

So, we can now calculate dy:

dy = (∂y/∂x)dx = (20)(0.03) = 0.6

This means that when x changes by 0.03, y changes by 0.6.

To calculate δy, we need to use the formula:

δy = |(∂y/∂x)δx|

where δx is the uncertainty in x.

In this case, we have:

δy = |(20)(0.03)| = 0.6

So, the uncertainty in y is also 0.6.

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Answer:

Step-by-step explanation:

The point (6, 1) is not a solution to the system.

(6, 1) lays on the dotted line.

C-Child ticket

4C-Adult tickets

6.10C+9.90(4C)=1188.20

6.10C+39.60C=1188.20

45.70C=1188.20

Divide both sides by 45.70 to get C.

C=26

This means 26 child tickets were sold that day.

Let's check our answer:

26×6.10=158.60

26×4=104 (Adult tickets)

104×9.90=1029.60

158.60+1029.60=1188.20

Therefore, 26 child tickets were sold on Friday.

The partial fraction decomposition for this integrand will have the form:
x2 − 2x − 1 = A/(x-1) + B/(x-1)

Once we find A and B, we can substitute them back into the original equation and integrate each term separately. This will allow us to evaluate the integral of x2 − 2x − 1 using the partial fraction decomposition.

To perform a partial fraction decomposition on the integrand x2 − 2x − 1, we first need to factor the denominator into linear factors. The quadratic x2 − 2x − 1 can be factored as (x-1)(x-1), which means we have a repeated linear factor of (x-1).

To decompose this, we need to write it in the form of a fraction with a numerator and denominator. The numerator will have a constant term for each repeated linear factor, and the denominator will be the product of each linear factor.

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The correct answer to convert 20 inches to feet using dimensional analysis is B. Divide 20 inches by 1ft/12 in.

To convert 20 inches to feet using dimensional analysis, we need to set up a conversion factor that relates inches to feet. We know that there are 12 inches in one foot, so we can write the conversion factor as 1 ft / 12 in. We want to cancel out the units of inches, so we can write 20 inches as 20 in / 1. Then, we can multiply 20 in / 1 by our conversion factor, making sure that the units cancel out appropriately:

20 in / 1 × 1 ft / 12 in = 20/12 ft

Simplifying, we get:

20 in / 1 × 1 ft / 12 in = 1.67 ft

Therefore, 20 inches is equal to 1.67 feet when using dimensional analysis and dividing by the conversion factor of 1ft/12in.

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Answer:

64

Step-by-step explanation:

Number of outcomes = number of choices per question ^ number of questions

In this case, the number of choices per question is 4 and the number of questions is 3. Plugging these values into the formula, we get:

Number of outcomes = 4^3 = 64

The calculated perimeter of the classroom is approximately 34 feet.

The area of the square classroom is given as 72 square feet.

Let's find the length of one side of the square by taking the square root of 72:

√(72) ≈ 8.5

So each side of the square is approximately 8.5 feet long.

The perimeter of the square is the sum of the lengths of all four sides:

Perimeter = 4 x Length of one side

Perimeter = 4 x 8.5 feet

Perimeter = 34 feet

Therefore, the perimeter of the classroom is approximately 34 feet.

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The correct answer is option D: that the values of the data must fall within the 1% critical range of the curve in order to be significant.

An alpha level of α = .01 sets the threshold for statistical significance at the 1% level, meaning that the values of the data must fall within the critical range of the curve (which represents the distribution of the data) that includes the central 99% of the values in order to be deemed statistically significant.

An alpha level of α = .01 is a statistical significance level that is commonly used in research. It represents the probability of obtaining a result as extreme or more extreme than the observed result, assuming the null hypothesis is true. A significance level of α = .01 means that the researcher has set the critical value at 0.01 or 1%.

Therefore, for a statistical test to be considered significant, the p-value must be less than 0.01. In other words, the values of the data must fall within the 1% critical range of the curve in order to be significant.

It is important to set a significance level before conducting a statistical test as it helps to determine the level of confidence in the results obtained from the test.

The correct answer is option D: that the values of the data must fall within the 1% critical range of the curve in order to be significant

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To solve the given 1-dimensional heat equation problem, we can use the method of separation of variables. The problem is defined as follows:

Partial Differential Equation (PDE): ∂u/∂t = α^2 ∂^2u/∂x^2, for t > 0 and 0 < x < 5.

Boundary conditions:
1. u(0, t) = 0
2. u(5, t) = 0

Initial condition: u(x, 0) = f(x) = -4 sin(Tx) + 3 sin(27x), for 0 < x < 5.

To solve this problem, perform the following steps:

1. Assume a solution in the form u(x, t) = X(x)T(t).
2. Substitute this solution into the PDE and separate the variables.
3. Solve the resulting ordinary differential equations (ODEs) for X(x) and T(t) subject to the given boundary conditions.
4. Obtain the general solution by summing the product of the separated solutions X_n(x)T_n(t) with appropriate coefficients.
5. Determine the coefficients by applying the initial condition and using Fourier series representation.

Since the problem is well-posed, a unique solution exists.

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The successive crests and troughs on the periodic function graph indicates that the period is 6.0 seconds, therefore;

A periodic function is a function that repeats the same values of the output variable at regular intervals.

The coordinates of the points on the periodic function graph are; (2.5, 2900), (5.5, 1100), (8.5, 2900), and (11.5, 1100)

The period is the time it takes to complete a cycle of the periodic function, which is the time between successive crests or troughs.

The crests and troughs in the graph are;

Crest; (2.5, 2900), (8.5, 2900)

Trough; (5.5, 1100), (11.5, 1100)

The period, which is the time between successive crests and troughs are therefore;

Period, T = 8.5 - 2.5 = 11.5 - 5.5 = 6.0

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Answer:

= 500 x 3^t

Step-by-step explanation:

Exponential equation!

The derivative of the cross product u(t) × v(t) with respect to t is given by:

d/dt [u(t) × v(t)] = [d/dt u(t)] × v(t) + u(t) × [d/dt v(t)]

Using the given functions, we have:

d/dt [u(t) × v(t)] = [leftangle0.gif 8cos(8t), 8sin(8t), 1 rightangle0.gif] × [t, cos(8t), sin(8t)] + [sin(8t), cos(8t), t] × [leftangle0.gif -8sin(8t), 8cos(8t), 0 rightangle0.gif]

Simplifying this expression, we get:

d/dt [u(t) × v(t)] = [8t, -8sin^2(8t), 8cos^2(8t)] + [8sin(8t), 8cos^2(8t), -8sin^2(8t)]

Therefore, the derivative of the cross product is:

d/dt [u(t) × v(t)] = [8t + 8sin(8t), 8cos^2(8t) - 8sin^2(8t), 8cos^2(8t) - 8sin^2(8t)]

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The triple integral for the given solid between the surfaces z=0, x= 1, z= 1-x^2, and z= 1 -y^2 is π/24.

To set up the triple integral for the solid between the given surfaces, we need to find the limits of integration for each variable.

Since the solid lies between the planes z=0 and z=1-x^2 and z=1-y^2, the limits for z are 0 to 1-x^2 and 0 to 1-y^2.

The solid is also bounded by the planes x=1 and y=1, so the limits for x and y are 0 to 1 and 0 to 1, respectively.

Therefore, the triple integral for the given solid is:

∫∫∫ dV = [tex]\int\limits^1_0[/tex] [tex]\int\limits^1_0[/tex]-y^2 [tex]\int\limits^1_0[/tex]-x^2 dzdydx

Simplifying the limits of integration, we get:

∫∫∫ dV = [tex]\int\limits^1_0[/tex] ∫ from 0 to √(1-x) ∫ from 0 to 1-x^2 dzdydx

Evaluating the integral, we get:

∫∫∫ dV = [tex]\int\limits^1_0[/tex] ∫ from 0 to √(1-x) (1-x^2) dydx

= [tex]\int\limits^1_0[/tex] [(1/3)(1-x^2)^(3/2)]dx

= (1/3) [tex]\int\limits^1_0[/tex] (1-x^2)^(3/2) dx

Making the substitution u = 1-x^2, we get:

∫∫∫ dV = (1/6) [tex]\int\limits^1_0[/tex] u^(1/2) (1-u)^(1/2) du

= (1/6) B(3/2, 3/2)

= (1/6) (Γ(3/2)Γ(3/2))/Γ(3)

= (1/6) [(√π/2)(√π/2)]/2

= π/24

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The calculated total weight of the fruit is 50 2/5 pounds

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

This means that

Banana = 6 * Apple

So, we have

Banana = 6 * 7 2/10 pounds.

Evaluate the products

Banana = 43 2/10 pounds.

So, the total weight is

total weight = apple + banana

This gives

total weight = 7 2/10 + 43 2/10

Evaluate the sum

total weight = 50 4/10

Simplify

total weight = 50 2/5

Hence, the total weight is 50 2/5 pounds

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For the given equation,there is no solution that satisfies the initial condition x(0) = 7.

What is equation?

An equation is a statement that shows the equality between two expressions, typically separated by an equals sign. Equations are used to represent relationships between variables or quantities, and solving an equation involves finding the values of the variables that satisfy the equality.

We start by separating the variables:

[tex]dx/dt = x^2/125\\\\(125/x^2) dx = dt[/tex]

Integrating both sides gives:

-125/x = t + C

where C is the constant of integration. To find C, we use the initial condition x(0) = 7:

-125/7 = 0 + C

C = -125/7

Substituting this back into our equation, we have:

-125/x = t - 125/7

Solving for x, we get:

x = 125/(t - 125/7)

This is the general solution to the differential equation. To find the particular solution that satisfies the initial condition x(0) = 7, we substitute t = 0 and x = 7 into the general solution:

7 = 125/(0 - 125/7)

7 = 125/( - 125/7)

7 = -7

This is a contradiction, which means that there is no solution that satisfies the initial condition x(0) = 7.

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Based on this, we can conclude that an increase in price will result in a decrease in total revenue, since the increase in price will be offset by a larger decrease in quantity demanded

To find the elasticity of demand, we need to calculate the derivative of q with respect to p multiplied by the ratio of p to q.

Taking the derivative of the demand function with respect to p, we get:

q + 100 = -p/q

Multiplying both sides by p/q, we get:

p/q * q + 100p/q = -p

Simplifying, we get:

p/q = -100/(q^2 - p)

When p = $200, we can substitute this value into the equation to get:

200/q = -100/(q^2 - 200)

Solving for q, we get:

q = 50

So at a price of $200, the quantity demanded is 50 units. To find the elasticity, we need to calculate:

E = (dq/dp) * (p/q)

Taking the derivative of the demand function with respect to p, we get:

dq/dp = -1/q^2

Substituting p = $200 and q = 50, we get:

dq/dp = -1/2500

Substituting into the formula for elasticity, we get:

E = (-1/2500) [tex]\times[/tex] (200/50) = -0.16

Since the elasticity is negative, we know that demand is inversely related to price, meaning that as the price increases, the quantity demanded will decrease.

Since the elasticity is greater than 1 in absolute value, we know that demand is elastic, meaning that a change in price will result in a relatively larger change in quantity demanded.

Based on this, we can conclude that an increase in price will result in a decrease in total revenue, since the increase in price will be offset by a larger decrease in quantity demanded.

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we have shown that n is divisible by d, which means that d | n.

What is Derivation ?

Derivation is a mathematical technique used to find the rate at which a function changes. In other words, it is a method for calculating the instantaneous rate of change of a function at a particular point. Derivation is an important tool in calculus, and it has a wide range of applications in fields such as physics, engineering, and economics.

We are given that dc | nc, which means that there exists an integer k such that nc = k(dc).

We need to show that d | n, which means that there exists an integer m such that n = md.

We can start by dividing both sides of the given equation nc = k(dc) by c:

n = k(d)

Since d and k are integers, their product k(d) is also an integer, which means that n is an integer.

Therefore, we have shown that n is divisible by d, which means that d | n.

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The equation of the plane with normal vector =⟨−5,2,5⟩ passing through the point =(4,1,8) in scalar form is 5x + 2y + 5z = 22.

1. Recall the equation of a plane in scalar form: Ax + By + Cz = D, where ⟨A, B, C⟩ is the normal vector of the plane, and (x, y, z) are the coordinates of any point on the plane.

2. In this case, the normal vector is given as ⟨−5, 2, 5⟩. Therefore, A = -5, B = 2, and C = 5.

3. The plane passes through the point (4, 1, 8). We can use this point to find the value of D. Substitute the point's coordinates into the equation: -5(4) + 2(1) + 5(8) = D.

4. Calculate the value of D: -20 + 2 + 40 = 22.

5. Now, we can write the equation of the plane in scalar form using the values of A, B, C, and D: -5x + 2y + 5z = 22.

So, the equation of the plane with normal vector ⟨−5, 2, 5⟩ passing through the point (4, 1, 8) in scalar form is: -5x + 2y + 5z = 22.

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To rewrite the given parametric equations as Cartesian equations, we need to eliminate the parameter t. For the first equation, we get the Cartesian equation y = (3/2)x - (5/4). For the second equation, we get the Cartesian equation y = ln(x^2).

For the first equation x(t) = 3t - 2, y(t) = 5t^2, we need to eliminate t to get the Cartesian equation. Solving for t in terms of x, we get t = (x + 2)/3. Substituting this value in the equation for y, we get y = 5((x+2)/3)^2. Simplifying this, we get y = (3/2)x - (5/4).

For the second equation x(t) = e^(2t), y(t) = e^(4t), we need to eliminate t to get the Cartesian equation. Taking the natural logarithm of both sides of the equation for y, we get ln(y) = 4t.

Solving for t, we get t = ln(y)/4. Substituting this value in the equation for x, we get x = e^(2(ln(y)/4)), which simplifies to x = y^(1/2). Therefore, the Cartesian equation for this parametric equation is y = ln(x^2).

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