In paral elogram DREW, the length of side DR is represented by \( 9 x-5 \) and the length of side we is represented by \( 3 x+7 \). Sove for \( x \). (A) 2 B) 4 (C) 8 D) 13

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Answer 1

The value of x is 2. Therefore, the correct answer is option (A).

In parallelogram DREW, the length of side DR is represented by \(9x-5\) and the length of side WE is represented by \(3x+7\). We need to solve for x.Solution:The opposite sides of a parallelogram are equal. Thus, DR = WE or

\(9x-5=3x+7\)Collect like terms on one side\

(9x-3x=7+5\)\(6x=12\)

Divide both sides by 6\(x=2\)

Therefore, x = 2

:The value of x is 2. Therefore, the correct answer is option (A).

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Related Questions

The average price of a gallon of gas was $3. 22 and 2014 and $2. 40 in 2015 what is the percent decrease in the price of gas​

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To calculate the percent decrease in the price of gas, we can use the following formula:

Percent decrease = ((Initial value - Final value) / Initial value) * 100

Let's substitute the values into the formula:

Initial value = $3.22

Final value = $2.40

Percent decrease = (($3.22 - $2.40) / $3.22) * 100

Simplifying the equation, we get:

Percent decrease = ($0.82 / $3.22) * 100

Calculating the division, we have:

Percent decrease = 0.254658 * 100

Rounding the result to two decimal places, we get:

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Algebraically determine the market equilibrium point.
Supply: p=1/4^q^2+10
Demand: p=86−6q−3q^2

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The market equilibrium point can be algebraically determined by setting the quantity demanded equal to the quantity supplied and solving for the equilibrium quantity and price.

In this case, the equilibrium quantity and price can be found by equating the demand and supply equations: 86 - 6q - 3q^2 = 1/(4q^2) + 10. To find the market equilibrium point, we need to equate the quantity demanded and the quantity supplied. The demand equation is given as p = 86 - 6q - 3q^2, where p represents the price and q represents the quantity. The supply equation is given as p = 1/(4q^2) + 10. Setting these two equations equal to each other, we have 86 - 6q - 3q^2 = 1/(4q^2) + 10. To solve this equation, we can first simplify it by multiplying both sides by 4q^2 to eliminate the denominator. This gives us 344q^2 - 24q - 12q^3 + 84q^2 - 840 = 0. By rearranging the terms and combining like terms, we obtain the cubic equation 12q^3 - 428q^2 + 24q + 840 = 0. Solving this equation will yield the equilibrium quantity (q) and corresponding price (p) that satisfy both the demand and supply equations, representing the market equilibrium point.

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Use A to estenate the average rate of change in the population from 2000 to 2014 (b) Eatmate the instantaneous rate of change in the populason in 2014 : (a) What is the expression for the average rate of chango? Solect the corret ansaer below and fit in the answer boxes io complese your choce. (Type whole numbers. Use descending ordec) B. limh→0​h(1+h)−f∣​ The average rate of change is people per year. (Round to the nearest thousand as needed) (b) What is the expressica for the instantaneous rate of change? Select the correct antwer below and fis in the answer bexes to complete your choice. (Type whole numbers.) A. limh→0​h(h+h)−f∣​ B. −1−1−1​ (b) What is the expression for the instantaneous rate of change? Select the correct answer below and fill in the answer boxes to comp (Type whole numbers.) A. limh→0​hf(+h)−f​ B. −f∣∣−f∣​ The instantaneous rate of change is people per year. (Round to the nearest thousand as needed.)

Answers

(a) The expression for the average rate of change is given by B. limh→0​h(1+h)−f∣​.

The average rate of change represents the overall change in the population over a certain period. In this case, we want to estimate the average rate of change in the population from 2000 to 2014. To find this, we use the given expression and substitute the appropriate values. However, the specific function f is not provided, so we cannot determine the exact value. The average rate of change will be in people per year, and it should be rounded to the nearest thousand as needed.

(b) The expression for the instantaneous rate of change is given by A. limh→0​hf(+h)−f​.

The instantaneous rate of change represents the rate of change at a specific point in time. In this case, we want to estimate the instantaneous rate of change in the population in 2014. The expression A. limh→0​hf(+h)−f​ is used to calculate the instantaneous rate of change. Again, the specific function f is not provided, so we cannot determine the exact value. The instantaneous rate of change will also be in people per year, and it should be rounded to the nearest thousand as needed.  

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Find the maximum of the function f(x,y)=6xy−x2+3y2 subject to the constraint x+y=4. Value of x at the constrained maximum: Value of y at the constrained maximum: Function value at the constrained maximum:

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The maximum of the function f(x,y)=6xy−x ^2+3y ^2

subject to the constraint is achieved at specific values of x and y.

The value of x at the constrained maximum: 2

The value of y at the constrained maximum: 2

The function value at the constrained maximum: 12

To find the constrained maximum, we need to optimize the objective function while satisfying the constraint. In this case, we have the function

f(x,y)=6xy−x ^2+3y ^2 and the constraint  x+y=4.

To proceed, we can use the method of Lagrange multipliers, which involves introducing a Lagrange multiplier, λ, to incorporate the constraint into the objective function. We form the Lagrangian function L(x, y, λ) as  L(x,y,λ)=f(x,y)−λ(x+y−4).

Next, we differentiate L(x, y, λ) with respect to x, y, and λ, and set the partial derivatives equal to zero to find critical points. Solving these equations, we obtain the values x = 2, y = 2, and λ = -2.

To determine if this critical point is a maximum, minimum, or saddle point, we evaluate the second-order partial derivatives of L(x, y, λ). After performing the calculations, we find that the second-order partial derivative test confirms that this critical point represents a maximum.

Hence, the maximum value of the function  is achieved at x = 2, y = 2, with a function value of 12.

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Consider the initial value problem
y′(t)=3y(t)+t,y(0)=2.
Find the first three Picard iterations. y0(t)⋅y1(t). and y2(t)

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The first three Picard iterations for the given initial value problem are y0(t) = 2, y1(t) = 2 + t^2 + 3t, and y2(t) = 2 + t^2 + 3t + (t^3)/3 + 2t^2 + 3t^2.

To find the Picard iterations, we start with the initial value y0(t) = 2. Then, we use the following formula for each iteration:

y_n+1(t) = y0(t) + ∫[0 to t] (3y_n(s) + s) ds,

where y_n(t) represents the nth iteration.

For the first iteration, we substitute y0(t) into the formula:

y1(t) = 2 + ∫[0 to t] (3(2) + s) ds

= 2 + [3s + (s^2)/2] evaluated from 0 to t

= 2 + 3t + (t^2)/2.

For the second iteration, we substitute y1(t) into the formula:

y2(t) = 2 + ∫[0 to t] (3(2 + 3s + (s^2)/2) + s) ds

= 2 + ∫[0 to t] (6 + 9s + (3s^2)/2 + s) ds

= 2 + [6s + (9s^2)/2 + (s^3)/3 + (s^2)/2] evaluated from 0 to t

= 2 + t^2 + 3t + (t^3)/3 + 2t^2 + 3t^2.

Hence, the first three Picard iterations are y0(t) = 2, y1(t) = 2 + t^2 + 3t, and y2(t) = 2 + t^2 + 3t + (t^3)/3 + 2t^2 + 3t^2.

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Find f′(x) and f′(c)
Function Value of c
f(x)=(x5+5x)(4x3+3x−3) c=0
f′(x)=
f′(c)=

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The derivative of the function f(x) = (x^5 + 5x)(4x^3 + 3x - 3) is f'(x) = 5x^4(4x^3 + 3x - 3) + (x^5 + 5x)(12x^2 + 3). To find f'(c), we substitute the value of c = 0 into the derivative equation.

To find the derivative of the given function f(x) = (x^5 + 5x)(4x^3 + 3x - 3), we can apply the product rule. The product rule states that the derivative of a product of two functions is the derivative of the first function times the second function plus the first function times the derivative of the second function.

Applying the product rule to f(x), we differentiate the first term (x^5 + 5x) as 5x^4 and keep the second term (4x^3 + 3x - 3) unchanged. Then, we add the first term (x^5 + 5x) multiplied by the derivative of the second term (12x^2 + 3).

Therefore, the derivative of f(x) is f'(x) = 5x^4(4x^3 + 3x - 3) + (x^5 + 5x)(12x^2 + 3).

To find f'(c), we substitute the value of c = 0 into the derivative equation. This gives us f'(0) = 5(0)^4(4(0)^3 + 3(0) - 3) + (0^5 + 5(0))(12(0)^2 + 3). Simplifying the expression gives f'(0) = 0 + 0 = 0.

Therefore, f'(c) is equal to 0 when c = 0.

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Answer the following questions: (a) Given the system \[ y[n]=0.5 y[n-1]+x[n], \] find the solution to \( y[n] \) when \( y[-1]=1 \) and \( x[n]=u[n] \). (6 Points) (b) Let \( x_{1}[n]=\left(\frac{1}{3

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(a)The solution to \(y[n]\) with the given initial condition and input sequence is: \[y[n] = \{1, 1.5, 1.75, 1.875, \ldots\}\]

(b) The solution to \(y[n]\) with the given initial conditions and input sequence is: \[y[n] = \left\{\frac{1}{3}, -\frac{1}{18}, \frac{5}{54}, \ldots\right\}\]

(a) To find the solution to \(y[n]\) when \(y[-1]=1\) and \(x[n]=u[n]\), we can recursively apply the given system equation.

Given:

\[y[n] = 0.5y[n-1] + x[n]\]

\(y[-1] = 1\) (initial condition)

\(x[n] = u[n]\) (unit step input)

To solve for \(y[n]\), we can substitute the values and iterate through the equation:

For \(n = 0\):

\[y[0] = 0.5y[-1] + x[0] = 0.5 \cdot 1 + 1 = 1.5\]

For \(n = 1\):

\[y[1] = 0.5y[0] + x[1] = 0.5 \cdot 1.5 + 1 = 1.75\]

For \(n = 2\):

\[y[2] = 0.5y[1] + x[2] = 0.5 \cdot 1.75 + 1 = 1.875\]

And so on...

The solution to \(y[n]\) with the given initial condition and input sequence is:

\[y[n] = \{1, 1.5, 1.75, 1.875, \ldots\}\]

(b) To solve the difference equation \[y[n] = \frac{1}{3}x_1[n] - 0.5y[n-1] + 0.25y[n-2]\] with the given initial conditions \(y[-1]=0\) and \(y[-2]=1\) and the input sequence \(x_1[n]=\left(\frac{1}{3}\right)^n\), we can use a similar iterative approach.

For \(n = 0\):

\[y[0] = \frac{1}{3}x_1[0] - 0.5y[-1] + 0.25y[-2] = \frac{1}{3} - 0.5 \cdot 0 + 0.25 \cdot 1 = \frac{4}{12} = \frac{1}{3}\]

For \(n = 1\):

\[y[1] = \frac{1}{3}x_1[1] - 0.5y[0] + 0.25y[-1] = \frac{1}{3} \cdot \left(\frac{1}{3}\right)^1 - 0.5 \cdot \frac{1}{3} + 0.25 \cdot 0 = \frac{1}{9} - \frac{1}{6} = -\frac{1}{18}\]

For \(n = 2\):

\[y[2] = \frac{1}{3}x_1[2] - 0.5y[1] + 0.25y[0] = \frac{1}{3} \cdot \left(\frac{1}{3}\right)^2 - 0.5 \cdot \left(-\frac{1}{18}\right) + 0.25 \cdot \frac{1}{3} = \frac{1}{27} + \frac{1}{36} + \frac{1}{12} = \frac{5}{54}\]

And so on...

The solution to \(y[n]\) with the given initial conditions and input sequence is:

\[y[n] = \left\{\frac{1}{3}, -\frac{1}{18}, \frac{5}{54}, \ldots\right\}\]

The iteration process can be continued to find the values of \(y[n]\) for subsequent values of \(n\).

It's important to note that in part (b), the input sequence \(x_1[n] = \left(\frac{1}{3}\right)^n\) was used instead of \(x[n]\) to solve the difference equation.

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Use the Fundamental Theorem of Calculus to evaluate the definite integral.
1 ∫−1 5 / x2+1 dx=

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Using the Fundamental Theorem of Calculus, we can evaluate the definite integral ∫[-1,1] 5/(x^2+1) dx. the value of the definite integral ∫[-1,1] 5/(x^2+1) dx is arctan(1) - arctan(-1).

To evaluate the definite integral, we can use the antiderivative of the integrand, which is the inverse tangent function, arctan(x). The Fundamental Theorem of Calculus states that the definite integral of a function f(x) from a to b can be evaluated by subtracting the value of the antiderivative at the lower limit (a) from the value of the antiderivative at the upper limit (b).

Applying the Fundamental Theorem of Calculus to the given integral, we have:

∫[-1,1] 5/(x^2+1) dx = arctan(x) |[-1,1]

Evaluating the antiderivative at the upper limit, we have:

arctan(1)

Evaluating the antiderivative at the lower limit, we have:

arctan(-1)

Subtracting the values, we get:

arctan(1) - arctan(-1)

Therefore, the value of the definite integral ∫[-1,1] 5/(x^2+1) dx is arctan(1) - arctan(-1).

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Exercise 1. Two servers (S. and Ss) with exponential service time and same service rate are busy completing service of two jobs at time t = 0. The server that completes service first is referred to as the winning server (Sw), the other is referred to as the losing server (St). Jobs must complete their service before departing from the queue. A) Compute the probability of S to be the winning server, i.e., P(S = S1) = P(S = S2). Compute the probability of S, to be the winning server, i.e., P(S = Sx) = P(S = Si) (pt. 10). B) Compute the expected departure time of the winning server, defined as ty > 0 [pt. 10). C) Compute the expected departure time of the losing server, defined as t > t pt. 10).

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A) Here, we have two servers: Server 1 (S1) and Server 2 (S2). And we need to compute the probability of S to be the winning server, i.e., P(S = S1) = P(S = S2).Since we have two servers with the same service rate, the jobs have equal chances of being assigned to either server.

Therefore, P(S = S1) = P(S = S2)

= 1/2.

(Both servers have equal probabilities of winning).

B) Expected departure time of the winning server, defined as ty > 0. It is also called the mean service time (MST) or the expected value of the service time. The expected value of an exponential distribution is equal to the reciprocal of the service rate. Thus, if the service rate of both servers is μ, then the expected departure time of the winning server will be 1/μ.

C) Expected departure time of the losing server, defined as t > t0. Since the two jobs can't leave until their services are complete, the service time of the winning server will be the total time taken by both jobs. Thus, the expected departure time of the losing server can be calculated by taking the expected departure time of the winning server (which is 1/μ) and subtracting the mean service time (MST) of a single job, which is 1/2μ. Therefore, the expected departure time of the losing server will be 1/μ - 1/2μ = 1/2μ.

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Let F(x)=f(x7) and G(x)=(f(x))7. You also know that a6=15,f(a)=2,f′(a)=4,f′(a7)=4 Then F′(a)=___ and G′(a)=___

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The derivative at x= a is F′(a)=28 and G′(a)=4 of the function [tex]F(x)=f(x^7)[/tex]

and  [tex]G(x)=(f(x))^7[/tex] by using chain rule of differentiation

To find the derivatives F′(a) and G′(a), we will use the chain rule and the given information.

First, let's start with[tex]F(x)=f(x^7)[/tex]. Using the chain rule, we have:

[tex]F'(x) = f'(x^7) * (7x^6)[/tex]

Since we need to find F′(a), we substitute a into the equation:

[tex]F'(a) = f(a^7) * (7a^6)[/tex]

[tex]F'(a) = f'(a^7) * (7a^6)[/tex]

Given that[tex]f'(a^7) = 4[/tex], we can substitute this value into the equation:

[tex]F'(a) = 4 * (7a^6) = 28a^6[/tex]

Therefore, [tex]F'(a) = 28a^6[/tex].

Now, let's move on to [tex]G(x)=(f(x))^7[/tex]. Again, using the chain rule, we have:

[tex]G'(x) = 7(f(x))^6 * f'(x)[/tex]

To find G′(a), we substitute a into the equation:

[tex]G'(a) = 7(f(a))^6 * f'(a)[/tex]

Given that f(a) = 2 and f′(a) = 4, we substitute these values into the equation:

[tex]G'(a) = 7(2)^6 * 4 = 7 * 64 * 4 = 1792[/tex]

Therefore, G′(a) = 1792.

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Given the joint density function of random variables x and y as: fxy(x,y) = u(x).u(y).x.e-x(y+1), (1, x ≥ 0 10, x < 0³ where u(x) = (1, x ≥ 0 10, x < 0³ and u(y)

a. Find the marginal density functions f(x) and fy(y).
b. Find the conditional density function fy(ylx).
c. Determine whether or not the random variables x and y are statistically independent. Verify your answer.

Answers

a. The marginal density function f(x) is 0.

b. The marginal density function f(y) is f(y) = u(y)/(y+1).

c. Variabel x and y are not statistically independent.

a. To find the marginal density functions f(x) and f(y), we integrate the joint density function fxy(x, y) over the respective variables:

For f(x):

f(x) = ∫fxy(x, y) dy

= ∫u(x).u(y).x.e^(-x(y+1)) dy

= x.e^(-x) ∫u(x) dy (since u(y) = 1 for all y)

= x.e^(-x) [y] (from 1 to ∞) (since ∫u(x) dy = y for y ≥ 1)

= x.e^(-x) ∞

= 0

Therefore, the marginal density function f(x) is 0.

For f(y):

f(y) = ∫fxy(x, y) dx

= ∫u(x).u(y).x.e^(-x(y+1)) dx

= u(y) ∫x.e^(-x(y+1)) dx (since u(x) = 1 for all x)

= u(y) [(-x)e^(-x(y+1)) - ∫(-e^(-x(y+1))) dx] (by integration by parts)

= u(y) [(-x)e^(-x(y+1)) + (1/y+1)e^(-x(y+1))] (from 0 to ∞)

= u(y) (0 - 0 + (1/y+1)e^(-∞(y+1)) - (1/y+1)e^(-0(y+1)))

= u(y) (0 + 0 - 0 + 1/(y+1))

Therefore, the marginal density function f(y) is f(y) = u(y)/(y+1).

b. To find the conditional density function fy(ylx), we use the formula for conditional density:

fy(ylx) = fxy(x, y)/f(x)

Since f(x) = 0 (as found in part a), the conditional density function fy(ylx) is undefined.

c. To determine whether x and y are statistically independent, we check if the joint density function factors into the product of the marginal density functions:

If fxy(x, y) = f(x) * f(y), then x and y are statistically independent.

In this case, f(x) = 0 and f(y) = u(y)/(y+1). Since fxy(x, y) does not factor into the product of f(x) and f(y), x and y are not statistically independent.

Note: The condition u(x) = 1 for x ≥ 0 and u(x) = 0 for x < 0 is unusual and seems to have an error in the given question. Typically, the unit step function (u(x)) is defined as u(x) = 1 for x ≥ 0 and u(x) = 0 for x < 0.

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Find a simplified difference quotient for the function. f(x)=6x²

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The simplified difference quotient for the function f(x) = [tex]6x^2[/tex] is (6(x + h)^2 - 6x^2) / h.

To find the difference quotient for a function, we need to calculate the average rate of change of the function as h approaches zero. In this case, the function is f(x) = [tex]6x^2[/tex].

The difference quotient formula is given by (f(x + h) - f(x)) / h, where h represents a small change in x. To simplify the difference quotient for f(x) = [tex]6x^2[/tex], we substitute the function values into the formula.

First, we calculate f(x + h) by replacing x in the function with (x + h). Thus, f(x + h) = [tex]6(x + h)^2[/tex]. Then, we substitute f(x) = [tex]6x^2[/tex].

Substituting the function values into the difference quotient formula, we get ([tex](6(x + h)^2)[/tex] - ([tex]6x^2[/tex])) / h. Expanding [tex](x + h)^2[/tex] gives us [tex]((6(x^2 + 2hx + h^2)) - (6x^2)) / h[/tex].

Simplifying further, we get ([tex]6x^2 + 12hx + 6h^2[/tex] - [tex]6x^2[/tex]) / h, which reduces to (12hx + [tex]6h^2[/tex]) / h. Canceling out h, we have 12x + 6h as the simplified difference quotient.

Therefore, the simplified difference quotient for f(x) = [tex]6x^2[/tex] is ([tex](6(x + h)^2)[/tex] - [tex]6x^2[/tex]) / h, which further simplifies to 12x + 6h.

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The function f:R2→R is given by the formula f([xy])=x2y+y3
Find the volume of the solid object that is between the graph of f and the (x,y)-plane and whose footprint is the triangle with corners [11],[15],[51].

Answers

The volume of the solid object between the graph of f and the (x, y)-plane, with the given footprint triangle, is 96 cubic units.

To find the volume of the solid object between the graph of the function f and the (x, y)-plane, with a footprint defined by the triangle with corners [1,1], [1,5], and [5,1], we can integrate the cross-sectional area perpendicular to the x-axis over the range of x-values.

Let's denote the x-coordinate of the triangle's vertices as x1=1, x2=1, and x3=5. The y-coordinates of the triangle's vertices can be determined by evaluating the function f at those points.

y1 = f([1,1]) = (1^2)(1) + (1^3) = 1 + 1 = 2

y2 = f([1,5]) = (1^2)(5) + (5^3) = 5 + 125 = 130

y3 = f([5,1]) = (5^2)(1) + (1^3) = 25 + 1 = 26

We can assume that the cross-sections perpendicular to the x-axis are rectangles with width dx and height equal to the difference in y-coordinates at each x-value.

The volume can be calculated using the integral:

V = ∫[x1,x3] (y3 - y1) dx

V = ∫[1,5] (26 - 2) dx

V = ∫[1,5] 24 dx

V = 24 ∫[1,5] dx

V = 24 [x] from 1 to 5

V = 24 * (5 - 1)

V = 24 * 4

V = 96

Therefore, the volume of the solid object between the graph of f and the (x, y)-plane, with the given footprint triangle, is 96 cubic units.

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1145 divided by 20.38​

Answers

The quotient between 1145 and 20.38 is 56.20

How to take the quotient?

Here we want to take the quotient between 1145 and 20.38.

We can take that quotient using a calculator, or we can rewrite it as follows:

1145/20.38 = (1145/2038)*100

That is to remove the decimal part, so we can take the quotient in an easier way.

Then we will get:

(1145/2038)*100 =  56.20

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1) Describe in English the general form or shape of all sentences that will be produced by the following grammar. \( S \rightarrow a S b b \mid X \) \( X \rightarrow c X \mid c Y \) \( Y \rightarrow y

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The general form or shape of the sentences that will be produced by the given grammar can be described as follows:

1. Each sentence starts with one or more 'a's, followed by a sequence of 'b's. The number of 'b's can vary.

2. Alternatively, a sentence can start with the letter 'c', followed by either another 'c' or a sequence of 'c's followed by a 'y'.

3. If the sentence starts with 'c' and is followed by another 'c', it can repeat this pattern indefinitely.

4. If the sentence starts with 'c' and is followed by a sequence of 'c's and then a 'y', it can also repeat this pattern indefinitely.

In summary, the sentences generated by this grammar consist of 'a's followed by a sequence of 'b's, and/or a repeating pattern of 'c's and 'y's.

For example, some valid sentences produced by this grammar are:

- abb

- aabb

- ac

- ccy

- cccy

- ccccy

- ccyccy

- and so on.

The grammar allows for different combinations and repetitions of 'a', 'b', 'c', and 'y', resulting in various sentence structures. The specific order and number of these elements will determine the exact form of each sentence. The grammar provides rules for generating sentences, and any sentence that follows these rules will be considered valid within the grammar's structure.

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(a) Jacqueline invests £6000 in an account that pays a compound interest of 3.5% per annum. iii. What is the value of her investment after the first year? iv. What is the value of her investment after 3 years? (2) v. Jacqueline would like to withdraw £9000. How long will Jacqueline have to wait before getting this value of £9000 ? (3) (b) A company bought some goods and needs to determine depreciation. vi. A company car was purchased for £13200 but depreciates at 6% per annum. How much will it be worth after 5 years? (5) vii. A certain machine was purchased for £18800 and depreciates at 10% per annum. Find the least number of years until it is worth less than £10000. (3)

Answers

i. After the first year, Jacqueline's investment would be worth £6,210.

ii. After 3 years, Jacqueline's investment would be worth £6,854.52.

iii. To determine how long Jacqueline needs to wait before her investment reaches £9,000, we can use the compound interest formula and solve for time. Let's assume the time required is t years. The formula is:Future Value = Present Value × (1 + Interest Rate)^Time

Rearranging the formula to solve for time:

Time = log(Future Value / Present Value) / log(1 + Interest Rate)

Plugging in the values, we get:

t = log(9000 / 6000) / log(1 + 0.035) ≈ 9.46 years

Therefore, Jacqueline will have to wait approximately 9.46 years to reach a value of £9,000

iv. To calculate the value of the car after 5 years, we can use the compound interest formula. Let's assume the value after 5 years is V.

V = 13200 × (1 - 0.06)^5 ≈ £9,714.72

Therefore, the car will be worth approximately £9,714.72 after 5 years.

v. To find the least number of years until the machine is worth less than £10,000, we can use the compound interest formula. Let's assume the number of years required is n.

10000 = 18800 × (1 - 0.10)^n

Dividing both sides by 18800 and rearranging the equation, we get:

(1 - 0.10)^n = 10000 / 18800

Taking the logarithm of both sides, we have:

n × log(1 - 0.10) = log(10000 / 18800)

Solving for n:

n = log(10000 / 18800) / log(1 - 0.10) ≈ 4.89 years

Therefore, the least number of years until the machine is worth less than £10,000 is approximately 4.89 years.

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The length of an arc of a circle is 26/9 pi centimeters and the measure of the corresponding central angle is 65 . What is the length of the circle's radius?

Answers

Therefore, the length of the circle's radius is approximately 3.6923 centimeters.

To find the length of the circle's radius, we can use the formula relating the length of an arc to the radius and the measure of the corresponding central angle.

The formula is given by:

Length of arc = radius * (angle in radians)

In this case, the length of the arc is given as (26/9)π centimeters and the measure of the central angle is 65 degrees.

First, we need to convert the angle from degrees to radians. Since 180 degrees is equal to π radians, we have:

65 degrees = (65/180)π radians

Now we can substitute the given values into the formula:

(26/9)π = radius * (65/180)π

We can simplify the equation by canceling out the π terms:

26/9 = radius * (65/180)

To solve for the radius, we can isolate it by dividing both sides of the equation by (65/180):

radius = (26/9) / (65/180)

Simplifying the right side of the equation:

radius = (26/9) * (180/65)

Calculating the value:

radius ≈ 3.6923 cm

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Consider the statement "The pool may not be used, and you may stay at home unless a lifeguard is on duty". 1) Translate the statement into symbolic notation using the letters P, H, and L. 2) Find its negation in symbolic notation and translate it back to English

Answers

1. The statement can be represented as (~P ∧ H) → L.

2. The negation of the statement (~P ∧ H) → L can be represented as ¬((~P ∧ H) → L).Translating it back to English will be "It is not the case that if the pool may not be used and you may stay at home, then a lifeguard is on duty."

Translating the statement into symbolic notation:

Let P represent "The pool may be used."

Let H represent "You may stay at home."

Let L represent "A lifeguard is on duty."

The statement can be represented as:

(~P ∧ H) → L

Finding the negation in symbolic notation and translating it back to English:

The negation of the statement (~P ∧ H) → L can be represented as ¬((~P ∧ H) → L).

Translating it back to English:

"It is not the case that if the pool may not be used and you may stay at home, then a lifeguard is on duty."

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Write the following quantities in scientific notation without prefixes: 500 mL = 5 x10-1 1 31.7 fg= 3.17 X10-14 8 x10-11 82.0 PW= Incorrect L Freedman College Chapter 1 End of C

Answers

500 mL can be written as 5 x 10^-1 in scientific notation without prefixes. To convert mL to liters, we divide by 1000 since there are 1000 mL in a liter. Therefore, 500 mL is equal to 0.5 L. In scientific notation, we express this as 5 x 10^-1.

31.7 fg can be written as 3.17 x 10^-14 in scientific notation without prefixes. To convert fg to grams, we divide by 1,000,000,000,000,000 since there are 1,000,000,000,000,000 femtograms in a gram. Therefore, 31.7 fg is equal to 0.0000000000000317 g. In scientific notation, this can be written as 3.17 x 10^-14.

82.0 PW cannot be correctly expressed in scientific notation without prefixes because PW stands for petawatts, which is a prefix indicating 10^15. In this case, 82.0 PW should be expressed as 82.0 x 10^15 W.

In conclusion, to express 500 mL and 31.7 fg in scientific notation without prefixes, we write them as 5 x 10^-1 and 3.17 x 10^-14, respectively. However, 82.0 PW cannot be correctly expressed without using a prefix, and the correct format for that quantity should be 82.0 x 10^15 W.

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Neil Dawson's Chalice is a truncated cone. A truncated
cone is the part that is left when a cone is cut by a plane
parallel to the base and the part containing the apex, or
vertex of the cone, is removed.
The height of the Chalice is 18 meters. The radius at the
top of the sculpture is 4.25 meters and the radius at the
bottom of the sculpture is 1 meter. The diagram shows
the Chalice as an untruncated cone.
Use the information in the diagram to calculate the lateral
area of the Chalice as a truncated cone. Please answer in a understanding short answer

Answers

The lateral area of the truncated cone is  246. 8 m²

How to determine the lateral area

The formula that is used for calculating the lateral area of a cone is expressed as;

A = πrl

Such that the parameters of the formula are;

A is the arear is the radiusl is the length

Substitute the values, we have that;

L² = 18² + 4.25²

Find the squares, we get;

l² =342. 06

l = 18. 49m

Then, the lateral area is;

A = 3.14 × 4.25 × 18. 49

Multiply the values

A = 246. 8 m²

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Solving Exponential and Logarithmic Equationsd.
1. Find the solution of each equation, correct to three decimal places.
a) 4^3x-5 = 16 b. 3e^x = 10 c. 5^2x - 1 = 20
d. 2^x+1 = 5^2x e. 28^x = 10^-3x f. e^x + e^-x = 5

Answers

The solution of each equation

a) x = 0.571

b) x = 1.405

c) x = 1.579

d) x = 1.152

e) x = -1.245

f) x = 1.324

What are the solutions to the given exponential and logarithmic equations?

Exponential and logarithmic equations can be solved by applying the appropriate rules and properties of exponential and logarithmic functions.

The solutions to the given equations are as follows:

a) The solution to [tex]4^{(3x-5)[/tex] = 16 is x = 0.571. This is found by expressing both sides with the same base and solving for x.

b) The solution to [tex]3e^x[/tex] = 10 is x = 1.405. By isolating the exponential term and applying logarithmic functions, we can solve for x.

c) For [tex]5^{(2x - 1)[/tex] = 20, the solution is x = 1.579. Similar to the previous equation, logarithmic functions are used to solve for x.

d) The solution to [tex]2^{(x+1)} = 5^{(2x)[/tex] is x = 1.152. Again, logarithmic functions are employed to solve for x.

e) In [tex]28^x = 10^{(-3x)[/tex], the solution is x = -1.245. By equating the exponential terms with the same base, we can solve for x.

f) The solution to [tex]e^x + e^{(-x)[/tex] = 5 is x = 1.324. This equation can be solved by recognizing it as a quadratic form.

Exponential and logarithmic equations can be solved using various techniques, such as expressing both sides with the same base, applying logarithmic functions, or recognizing quadratic forms.

These methods enable finding the values of x that satisfy the given equations. Understanding the properties and rules of exponential and logarithmic functions is crucial in effectively solving such equations.

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Evaluate k=1∑[infinity] ke−2k2 using the integral test. Show positivity, and detreasing.

Answers

To evaluate the series ∑(k=1 to ∞) ke^(-2k^2) using the integral test, we first check the positivity and decreasing properties of the terms.

Positivity: For all k ≥ 1, ke^(-2k^2) is positive since both k and e^(-2k^2) are positive.

Decreasing: To determine if the terms of the series are decreasing, we can examine the derivative of ke^(-2k^2). Let's calculate the derivative:

d/dk (ke^(-2k^2)) = e^(-2k^2) - 4k^2e^(-2k^2)

Since the derivative is not easy to analyze, we can instead consider the function f(k) = e^(-2k^2) - 4k^2e^(-2k^2) and study its behavior. By taking the derivative of f(k), we find:

f'(k) = -4e^(-2k^2)(k^2 - 1)

The critical points occur when f'(k) = 0. Solving k^2 - 1 = 0, we obtain k = ±1.

When k < -1 or -1 < k < 1, f'(k) < 0, indicating that f(k) is decreasing. However, when k > 1, f'(k) > 0, suggesting that f(k) is increasing. Therefore, f(k) is decreasing for k < -1 or -1 < k < 1 and increasing for k > 1.

In summary, the series ∑(k=1 to ∞) ke^(-2k^2) satisfies the positivity condition but does not satisfy the decreasing condition. Consequently, the integral test cannot be applied to evaluate this series.  

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Please detail three key skills/strengths you have developed and outline why these will help you complete your studies and become a mathematics teacher?

Answers

Three key skills/strengths I have developed that will help me complete my studies and become a mathematics teacher are strong analytical skills, effective communication skills, and patience.

Strong analytical skills: Mathematics is a subject that requires a high level of analytical thinking and problem-solving. Through my studies and practice in mathematics, I have honed my analytical skills, allowing me to break down complex problems into smaller, more manageable components. This skill will help me understand and explain mathematical concepts to students, identify common misconceptions, and provide effective guidance to help them grasp difficult concepts.

Effective communication skills: As a mathematics teacher, clear and effective communication is essential in conveying complex ideas and principles to students. I have developed strong communication skills through my experience in explaining mathematical concepts to my peers and classmates. I can articulate ideas in a concise and understandable manner, adapt my communication style to suit different learning styles, and use visual aids and real-life examples to enhance understanding. These skills will enable me to effectively engage students, facilitate class discussions, and address any questions or concerns they may have.

3. Patience: Patience is a crucial attribute for any teacher, especially in the field of mathematics where students may encounter difficulties and frustrations. I have cultivated patience through my experiences as a tutor and mentor, guiding students through challenging math problems and concepts. I understand that each student learns at their own pace and may require different approaches or additional support. My patience will allow me to provide individualized attention, create a supportive learning environment, and help students overcome obstacles by breaking down problems and providing step-by-step guidance.

Overall, my strong analytical skills, effective communication skills, and patience will contribute to my success as a mathematics teacher by enabling me to explain complex concepts, engage students effectively, and support them in their learning journey. These skills will help create an inclusive and nurturing classroom environment, fostering a love for mathematics and empowering students to reach their full potential.

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Questions: In this question we will explore significant figures, and multi-part answers. Consider variables 2 = 21.024 and y=6.00. Notice that I is known to five significant figures, and y is known to three significant figures. Part 1) Calculate the quantity z = . You should find that this is equal to 3.504. Given that the maximum number of significant figures common to both I and y is three, we can only know z correctly to three significant figures. So to answer the question, you should enter your answer for z correct to three significant figures. Now.consider if you wish to calculate a quantity involving z, such as m=22. You should use the non-rounded value of z, before you wrote it correct to three significant figures. Notice that if you don't do this, you will end up with a different answer. Correct: m=2 x z=2 x 3.504 = 7.008. Now, given that z is known to three significant figures, you would enter your answer as m=7.01. Incorrect m=2 x z=2 x 3.50 = 7.00. Part 2) Now, if I were to use m again, would I use m= 7.008 or m=7.01? correct value of m to reuse = (No answer given) m O 7.008 07.01 Check

Answers

The quantity z  is  3.504 and  the correct value of "m" to reuse in further calculations would be m = 7.008.

When performing calculations, it is generally recommended to use the full, unrounded values of intermediate results to maintain accuracy. Rounding off intermediate values can introduce rounding errors that accumulate and may lead to less precise final results.

In the given scenario, the initial value of "z" was rounded to three significant figures (3.504), but for subsequent calculations involving "m," it is advised to use the non-rounded value (7.008). This preserves the precision of the calculation and minimizes any potential rounding errors.

By using the full, unrounded value of "z" (7.008) in the calculation of "m = 2 x z," you obtain a more accurate result (m = 14.016) than if you had used the rounded value of "z" (m = 2 x 3.50 = 7.00). Therefore, to maintain accuracy and adhere to the appropriate number of significant figures, it is important to use the non-rounded value of "m" (m = 7.008) when reusing it in subsequent calculations.

In summary, using the non-rounded value of "m" (7.008) ensures that subsequent calculations maintain accuracy and consistency with the appropriate number of significant figures.

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In order to meaningfully teach mathematics in general and
geometry in particular, developing each student's conceptual
understanding is important.
Discuss the importance of conceptual understanding in

Answers

Conceptual understanding is crucial for teaching mathematics, especially geometry, as it allows students to grasp the underlying principles and connections rather than relying solely on memorization or procedural knowledge.

Conceptual understanding plays a vital role in teaching mathematics, and specifically geometry, as it goes beyond rote memorization and procedural knowledge. Rather than simply learning formulas and rules, students with conceptual understanding grasp the fundamental concepts and principles that underpin mathematical ideas. This comprehension allows them to make connections between different concepts, recognize patterns, and apply their knowledge in a flexible and creative manner.

In geometry, for instance, conceptual understanding involves developing an intuitive understanding of shapes, spatial relationships, and geometric properties. Students who possess conceptual understanding are not solely reliant on memorizing formulas to solve problems; instead, they can reason and analyze geometric relationships, identify similarities and differences between shapes, and construct logical arguments to support their conclusions.

By emphasizing conceptual understanding, educators enable students to build a strong foundation in mathematics. This deep understanding equips students with the tools to solve complex problems, think critically, and approach mathematical challenges with confidence. Moreover, conceptual understanding in mathematics extends beyond the subject itself, as it cultivates skills such as logical reasoning, abstract thinking, and problem-solving that are valuable in various academic disciplines and real-life situations. Therefore, nurturing conceptual understanding in mathematics, particularly in geometry, is essential for empowering students and preparing them for success in their academic and professional journeys

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Find an equation of the line tangent to the graph of f(x) = 5-5x^2 at (4, -75).
The equation of the tangent line to the graph of f(x) = 5-5x^2 at (4,-75) is
y = _____________
(Type an expression using x as the variable.)

Answers

The equation of the line tangent to the graph of f(x) at (4,-75) is y = -40x + 235

Given that the function is `f(x) = 5 - 5x²`.

We need to find the equation of the line tangent to the graph of f(x) at (4,-75).

Let us differentiate `f(x)`.`f(x) = 5 - 5x²`

The first derivative of the function is;`f'(x) = -10x`

Now let's find the equation of the tangent line at x = 4.

Let m be the slope of the tangent line.

`m = f'(4)` `

= -10 (4)

= -40`

Now we know the slope of the tangent line is -40.

Using the slope-intercept form of a line, we get;

y - y1 = m(x - x1)

Putting the given point (4,-75) in the equation;

y + 75 = -40(x - 4)

Rearranging the equation, we get; y = -40x + 235

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1., express the following properties in propositional logic:
(a) For every location that is a cliff, there is an
adjacent location to it that contains some
non null quantity of resource r3.

(b) For every location that contains some
non null quantity of resource r2,
there is exactly one adjacent location that is a hill
.
(c) Resource r1 can only appear in the corners of the
grid (the corners of the grid are the locations
(1, 1), (K, 1), (1, K), (K, K)).

Answers

(a) The proposition can be expressed as ∀x(Cliff(x) → ∃y(Adjacent(x, y) ∧ NonNull(y, r3))).

(b) The proposition can be expressed as ∀x(NonNull(x, r2) → (∃y(Adjacent(x, y) ∧ Hill(y)) ∧ ¬∃z(Adjacent(x, z) ∧ Hill(z) ∧ ¬(z = y)))).

(c) The proposition can be expressed as ∀x(Resource(x, r1) → (Corner(x) ∧ ¬∃y(Resource(y, r1) ∧ ¬(x = y) ∧ Adjacent(x, y)))).

(a) In propositional logic, we use quantifiers (∀ for "for every" and ∃ for "there exists") to express the properties. The proposition (a) states that for every location that is a cliff (Cliff(x)), there exists an adjacent location (Adjacent(x, y)) to it that contains some non-null quantity of resource r3 (NonNull(y, r3)).

(b) The proposition (b) states that for every location that contains some non-null quantity of resource r2 (NonNull(x, r2)), there is exactly one adjacent location (y) that is a hill (Hill(y)), and there are no other adjacent locations (z) that are hills (¬(z = y)).

(c) The proposition (c) states that resource r1 (Resource(x, r1)) can only appear in the corners of the grid (Corner(x)), and there are no other adjacent locations (y) that contain resource r1 (Resource(y, r1)).

By using logical connectives (∧ for "and," ∨ for "or," ¬ for "not"), quantifiers (∀ for "for every," ∃ for "there exists"), and predicate symbols (Cliff, NonNull, Resource, Hill, Corner), we can express these properties in propositional logic to represent the given statements accurately.

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If
v(t) = √t^7 - √t

Then find the second derivative, v" (t) = ____________

Answers

To determine the second derivative, v" (t), differentiate v'(t) again v"(t) = (3 / 2) * 3t1/2 − (1 / 2) * (1 / 2t−1 / 2) v"(t) = (9t1/2 / 2) − (1 / 4t3/2)Thus, the second derivative, v" (t) = (9t1/2 / 2) − (1 / 4t3/2) can be the solution.

Given, v(t)

= √t7 - √t To find the second derivative, v" (t)Steps:Let's find the first derivative of the given function.Then differentiate v'(t) to find the second derivative. The expression v(t)

= √t7 - √t is provided. To determine the second derivative, v" (t), the steps are given below:v(t)

= √t7 - √t Differentiate both sides of the equation with respect to t using the chain rule.v'(t)

= (1 / 2) * (t7 - t)−1/2 * 7t6 − 1 − (t)−1/2 * 1/2 * t−1/2v'(t)

= (1 / 2t1 / 2) * (t7 - t) − (1 / 2t1 / 2) v'(t)

= 3t3 / 2 - 1 / 2t1 / 2. To determine the second derivative, v" (t), differentiate v'(t) again v"(t)

= (3 / 2) * 3t1/2 − (1 / 2) * (1 / 2t−1 / 2) v"(t)

= (9t1/2 / 2) − (1 / 4t3/2)Thus, the second derivative, v" (t)

= (9t1/2 / 2) − (1 / 4t3/2) can be the solution.

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(a) Give the Binomial series for f(x)=1/√(1+x^2)
(b) Give the Maclaurin series for F(x)=xf′(x)

Answers

The binomial series for the function f(x) = 1/√(1+x^2) and the Maclaurin series for the function F(x) = xf'(x) can be derived through steps

(a) The binomial series for the function f(x) = 1/√(1+x^2) can be obtained by using the binomial expansion. The general form of the binomial series is given by:

(1+x)^r = 1 + rx + (r(r-1)x^2)/2! + (r(r-1)(r-2)x^3)/3! + ...

Applying this to our function f(x), we have:

f(x) = (1+x^2)^(-1/2) = 1 + (-1/2)(-1)x^2 + (-1/2)(-1/2-1)(-1)x^4/2! + ...

Simplifying this expression, we get:

f(x) = 1 - x^2/2 + (3/8)x^4/4 - (5/16)x^6/6 + ...

(b) The Maclaurin series for the function F(x) = xf'(x) can be derived by taking the derivative of f(x) with respect to x and then multiplying it by x. Let's find the derivatives of f(x):

f'(x) = (-1/2)(-1)2x/√(1+x^2) = x/√(1+x^2)

f''(x) = (1/√(1+x^2)) - (x^2/√(1+x^2)^3) = 1/√(1+x^2)^3

Now, multiplying f'(x) by x, we have:

F(x) = xf'(x) = x(x/√(1+x^2)) = x^2/√(1+x^2)

The Maclaurin series for F(x) is:

F(x) = x^2/√(1+x^2) = x^2 - (1/2)x^4 + (3/8)x^6 - (5/16)x^8 + ...

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344 thousands x 1/10 compare decimal place vaule

Answers

To compare the decimal place value of 344 thousands multiplied by 1/10, let's first calculate the product:

344 thousands * 1/10 = 34.4 thousands

Comparing the decimal place value, we can see that the original number, 344 thousands, has no decimal places since it represents a whole number in thousands. However, the product, 34.4 thousands, has one decimal place.

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All of the options were exercised during the year 2023:17,800 on January 3 when the market price was $68, and 8,900 on May 1 when the market price was $78 ashare. Prepare journal entries relating to the stock option plan for the years 2021, 2022, and 2023. Assume that the employee performs services equally in 2022 and 2023 . (Credit occount titles are outomatically indented when amount is entered, Do not indent menualix if no entry is required, select "No Entry" for the account tifles and enter O for the amounts. Round intermediate coilculations to 5 decimal places, es. 1.24687 and final answers to 0 decimal places, es. 5,125. Over an extended period of time the United States has been responsible for the majority of global CO2 emissions,at 25% of the total for all countries. In 2008 the largest emitter was ? By what ages should an infant double and triple his or her birth weight? Choose the single best answer.C. Double by 5 months, triple by 12 months Which statement best describes the author's use ofevidence to establish logos?O The author cites historical facts about otherCherokees' experiences with selling land to supportthe point that they, too, will be moved to inferiorlands.O The author provides detailed descriptions of thelands the Cherokee would acquire to stress thebelief that they should not move.O The author lists the specific features that make thecurrent land on which the Cherokee live valuable, toexplain why the Cherokee should not leave it.O The author includes the exact amount paid for otherCherokee lands to prove that their land is worth farmore than they are being offered. the study of management grew out of industrialization taking place in the early 20th centurytruefalse the problem of under enrollment refers to indian school children who which of the following best describes a hospital indemnity policy? 3 A sample of gas with 2 Moles has a volume of 0.3 m expands into a vacuum where the total final volume is 0.7 m. What is the change in entropy in J/K? J/K Submit Answer Tries 0/2 What is the entropy change when 45 g of water vapor condenses and becomes liquid water? The heat of fusion of water is 333 J/g, and the heat of vaporization of water is 2260 J/g. The freezing point of water is 0 C, and the boiling point of water is 100 C. 273 J/K AS-Q/T. Does the entropy increase or decrease? if you reach to pick up a coffee from your desk, your brain is sending messages to the muscles in your arm through the _____ neurons. While hiking you pass a mile maker indicating your elevation as 4,500 above sea level. The next mile marker indicates you gained 250' elevation. What is the gradient of the section of trail you just hiked?