the average number of calls received by a switchboard in a 30 minute period is 17. (round your answers to four decimal places.) (a) what is the probability that between 10:00 and 10:30 the switchboard will receive exactly 13 calls? (b) what is the probability that between 10:00 and 10:30 the switchboard will receive more than 10 calls but fewer than 19 calls? (c) what is the probability that between 10:00 and 10:30 the switchboard will receive fewer than 10 calls?

Answers

Answer 1

a. The probability of exactly 13 calls is approximately 0.0765.

b. The probability of more than 10 but fewer than 19 calls is approximately 0.7472.

c. The probability of fewer than 10 calls is approximately 0.0952.

What is probability?

Probability is a way to gauge how likely something is to happen. Many things are difficult to forecast with absolute confidence.

This problem can be solved using the Poisson distribution, which models the number of events that occur in a fixed time interval, given the average rate of occurrence.

Let λ be the average number of calls received by the switchboard in a 30 minute period. Then we have:

λ = 17

(a) To find the probability of exactly 13 calls in a 30 minute period, we use the Poisson distribution with λ = 17 and x = 13:

P(x = 13) = [tex](e^{(-\lambda)} * \lambda^x)[/tex] / x!

P(x = 13) = [tex](e^{(-17)} * 17^{13})[/tex] / 13!

P(x = 13) ≈ 0.0765

So the probability of exactly 13 calls is approximately 0.0765.

(b) To find the probability of more than 10 but fewer than 19 calls in a 30 minute period, we can use the cumulative distribution function (CDF) of the Poisson distribution. The probability of more than 10 calls is:

P(x > 10) = 1 - P(x ≤ 10)

To find P(x ≤ 10), we can sum the probabilities of 0 to 10 calls:

P(x ≤ 10) = Σ [tex](e^{(-\lambda)} * \lambda^x)[/tex] / x!

P(x ≤ 10) ≈ 0.2423

So:

P(x > 10) = 1 - P(x ≤ 10) ≈ 0.7577

Similarly, the probability of fewer than 19 calls is:

P(x < 19) = Σ [tex](e^{(-\lambda)} * \lambda^x)[/tex] / x!

P(x < 19) ≈ 0.9895

So:

P(10 < x < 19) = P(x < 19) - P(x ≤ 10) ≈ 0.7472

Therefore, the probability of more than 10 but fewer than 19 calls is approximately 0.7472.

(c) To find the probability of fewer than 10 calls in a 30 minute period, we can use the CDF of the Poisson distribution:

P(x < 10) = Σ [tex](e^{(-\lambda)} * \lambda^x)[/tex] / x!

P(x < 10) ≈ 0.0952

Therefore, the probability of fewer than 10 calls is approximately 0.0952.

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Related Questions

How many third roots does -512 have?

Answers

Answer:

There only one real root, which is 8-

-8 × -8 × -8 = -512

Hope this helps :)
Pls brainliest...

Answer: I think there is 1 : -8

Step-by-step explanation: It's because you're CUBE rooting a negative number, so the answer has to be negative, resulting in only 1 answer, as opposed to if you were square rooting.

find the inverse of the given matrix, if it exists. use the algorithm for finding a−1 by row reducing [a i].

Answers

The inverse of the matrix A is:

| -5  2 |

|   3 -1 |

How to find the inverse of a matrix using row reduction?

To find the inverse of a matrix using row reduction, we can use the following algorithm:

1. Write the matrix A next to the identity matrix I, separated by a vertical line to obtain the augmented matrix [A|I].

2. Apply row operations to transform the left side of the augmented matrix into the identity matrix I. Perform the same row operations on the right side of the augmented matrix to obtain the inverse matrix A^-1.

3. If the left side of the augmented matrix cannot be transformed into I, then A does not have an inverse.

Let's apply this algorithm to find the inverse of the matrix A:

```

| 1  2 |

| 3  5 |

```

We first write the augmented matrix [A|I]:

```

| 1  2 | 1  0 |

| 3  5 | 0  1 |

```

Next, we perform row operations to transform the left side of the augmented matrix into I:

R2 - 3R1 -> R2

```

| 1  2 | 1   0 |

| 0 -1 | -3  1 |

```

-R2 -> R2

```

| 1  2 | 1    0 |

| 0  1 | 3   -1 |

```

-2R2 + R1 -> R1

```

| 1  0 | -5   2 |

| 0  1 | 3   -1 |

```

We have now transformed the left side of the augmented matrix into I, so the right side is the inverse matrix:

```

| -5  2 |

|  3 -1 |

```

Therefore, the inverse of the matrix A is:

```

| -5  2 |

|   3 -1 |

```

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Suppose you have the same box with a volume of 400 i n . 3 in. ​3 ​​ and a height of 5 in. You now also know that the box is 8 in. wide. What is the length of the box?

Answers

Answer:

length = 10 in.

Step-by-step explanation:

volume = 400 in.³

height = 5 in.

width = 8 in.

volume = length × width × height

V = LWH

400 = L × 8 × 5

400 = 40L

40L = 400

L = 400/40

L = 10

Answer: length = 10 in.

how to find critical points of f(x)= x^3 - 2x^2

Answers

Answer:

x = 0 and x = 4/3

Step 1:  First, we must find the derivative of f(x), noted by f'(x)

When you have a polynomial in the form x^n, we take the derivative of each polynomial using the following formula:

[tex]f'(x)=nx^n^-^1[/tex]

This means that the exponent becomes a coefficient and we subtract from the exponent.

We can do take the derivatives of x^3 and -2x^2 separately and combine them at the end:

x^3:

[tex]x^3\\3x^3^-^1\\3x^2[/tex]

-2x^2

[tex]-2x^2\\-2(2x^2^-^1)\\-4x[/tex]

Thus, f'(x) is 3x^2 - 4x

Step 2:  Critical points are found when f'(x) = 0 or when f'(x) = undefined.  There are no values for x which would make 3x^2 - 4x undefined, so we can set the function equal to 0 and solving will give us our critical points

We see that we can factor out x from 3x^2 - 4x to get

x(3x - 4) = 0

Now, we can set the two expressions equal to 0 to solve for x:

Setting x equal to 0:

x = 0

Setting 3x - 4 equal to 0:

3x - 4 = 0

3x = 4

x = 4/3

Therefore, the two critical points of the function are x = 0 and x = 4/3

what is the density, measured in grams per cubic centimeter, of a cube with 8-inch sides that weighs 700 grams? (1 cubic inch approximately 16.4 centimeters.) round to the nearest hundredths.

Answers

The density of the cube is 0.08343 grams per cubic centimeter

The side of cube is 8 inches

and, We know that :

The formula of Density is :

D = mass/ volume

The weight of a cube is 700 gm.

First, we convert the side inches into cm

For conversion, We have to multiply by 2.54

=> 8 × 2.54

=> 20.32cm

Now, For finding the density

We have to calculate the volume of cube :

Volume of cube = [tex](side)^3[/tex]

Volume of cube = 8390.18[tex]cm^3[/tex]

And, plug all the values in the formula of density.

Density = 700/8390.18[tex]cm^3[/tex]

Density = 0.08343 grams per cubic centimeter

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Beginning with the red graph, describe how the graph transformed to get to the blue graph? Select all that apply. A translation of 1 unit left B translation of 1 unit right C translation of 2 units up D translation of 2 units down E horizontal stretch by a factor of 2 F vertical stretch by a factor of 2 G reflection across the x-axis H reflection across the y-axis

Answers

The correct options are:-

Option B: Translation of 1 unit right

Option F: Vertical stretch by a factor of 2

Translation is a type of transformation in mathematics that involves moving a shape or object without changing its size, shape or orientation.

This is done by sliding the object along a straight line in a particular direction, such as up, down, left or right.

Based on the given information, the transformations that were applied to the red graph to obtain the blue graph are:

A translation of 1 unit right (Option B).

A vertical stretch by a factor of 2 (Option F).

Therefore, the correct options are:

Translation of 1 unit right?

Vertical stretch by a factor of 2.

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In a survey conducted among some people of a community, 650 people like meat, 550 people don't like meat, 480 don't like fish and 250 like meat but not fish. (i) How many people were surveyed? (ii) How many people like fish but not meat? (iii) How many people are vegetarians? ​

Answers

1. 1430 people were surveyed.

2. 150 people like fish but not meat.

3. 330 people are vegetarians.

The total number of persons surveyed

1. 650 (total who like meat) - 250 (who like meat but not fish) = 400 (who like both meat and fish)

Now, we know that 550 people don't like meat, and 480 people don't like fish. Since 400 people like both meat and fish, the total number of people surveyed is:

550 (don't like meat) + 480 (don't like fish) + 400 (like both meat and fish) = 1430

So, 1430 people were surveyed.

2. 550 (don't like meat) - 400 (like both meat and fish) = 150

So, 150 people like fish but not meat.

3. 480 (don't like fish) - 150 (like fish but not meat) = 330

So, 330 people are vegetarians.

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8.8.PS-9
Find the surface area of
the prism.
The surface area isin.².
7 in.
15 in.
4 in.

Answers

The surface area of the given prism is 386 square inches.

To find the surface area of a prism, we need to find the area of all its faces and add them up.

The given prism has a rectangular base with dimensions of 7 inches by 15 inches, and a height of 4 inches.

The two rectangular faces (front and back) have dimensions of 7 inches by 4 inches,

so each has an area of 7 x 4 = 28 square inches.

The two rectangular faces (sides) have dimensions of 15 inches by 4 inches,

so each has an area of 15 x 4 = 60 square inches.

The top and bottom faces are both rectangles with dimensions of 7 inches by 15 inches,

so each has an area of 7 x 15 = 105 square inches.

Therefore, the total surface area of the prism is:

2(28 sq in) + 2(60 sq in) + 2(105 sq in) = 56 sq in + 120 sq in + 210 sq in

                                                               = 386 sq in.

So, the surface area of the given prism is 386 square inches.

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write formulae that give the evolution of the concentrations in terms of the extent of reaction if n2(0)

Answers

In order to write formulae that give the evolution of the concentrations in terms of the extent of reaction, we need to use the stoichiometry of the reaction and the initial concentrations of the reactants.

Let's consider a generic reaction of the form:

a A + b B ⟶ c C + d D

where A and B are the reactants, C and D are the products, and a, b, c, and d are the stoichiometric coefficients. The extent of reaction, denoted by ξ, represents the amount of reaction that has occurred and is related to the change in the concentrations of the reactants and products by the stoichiometry of the reaction:

Δ[A] = -aξ

Δ[B] = -bξ

Δ[C] = cξ

Δ[D] = dξ

where Δ[X] is the change in concentration of species X. Using these relationships, we can write the evolution of the concentrations in terms of the extent of reaction as follows:

[A] = [A]0 - aξ

[B] = [B]0 - bξ

[C] = cξ

[D] = dξ

where [X]0 is the initial concentration of species X. These formulae give the concentrations of the reactants and products as a function of the extent of reaction ξ. Note that the concentrations of the reactants decrease as the reaction proceeds, while the concentrations of the products increase.

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HELP PLEASESSS MAKE YOU AS BRANLESTS

Answers

Answer:

"Then I stopped the machine, and saw about me again the old familiar laboratory, my tools, my appliances just as I had left them. I got off the thing very shakily and sat down upon my bench. For several minutes I trembled violently. Then I became calmer. Around me was my old workshop again, exactly as it had been. I might have slept there, and the whole thing have been a dream.

Step-by-step explanation:

A company is designing a new cylindrical water bottle. The volume of the bottle will be 158 cm^3. The height of the water bottle is 8.3 cm. What is the radius of the water​ bottle? Use 3.14 for pie

Answers

The volume of a cylindrical water bottle can be calculated using the formula:

V = πr^2h

where V is the volume, r is the radius, h is the height, and π is approximately 3.14.

In this case, we are given that the volume of the water bottle is 158 cm^3 and the height is 8.3 cm. We can substitute these values into the formula and solve for the radius:

158 = 3.14r^2(8.3)

Divide both sides by (3.14)(8.3) to isolate r^2:

r^2 = 158 / (3.14)(8.3)

r^2 ≈ 6.0

Take the square root of both sides to find r:

r ≈ √6.0

r ≈ 2.45 cm

Therefore, the radius of the water bottle is approximately 2.45 cm.

Answer: Around 2.46 cm.

Step-by-step explanation:

The volume for a cylinder is volume = πr^2 x h

Substitute the variables
158 = 3.14 x r^2 x 8.3

Simplify the right side (multiple 3.14 x 8.3) to get 158 = r^2 x 26.062

Divide both sides by 26.062 to get approximately 6.06 = r^2

To get rid of the exponent, take the square root of 6.06, which is around 2.46.

5. (16 pts) find the maclaurin series for f(x) using the definition of a maclaurin series. [assume that has a power series expansion. also find the associated radius of convergence. f(x) = e ^ (- 6x)

Answers

The Maclaurin series for f(x) is:[tex]f(x) = 1 - 6x + 36x^2 - 216x^3 + ...[/tex]

The associated radius of convergence for this Maclaurin series is infinite, which means the series converges for all values of x.

The Maclaurin series for the function [tex]f(x) = ( {e}^{-6x} )[/tex] can be found using the definition of a Maclaurin series. The Maclaurin series represents a function as an infinite sum of terms, each term being a derivative of the function evaluated at x = 0, multiplied by a power of x divided by the factorial of the power.

To find the Maclaurin series for f(x),

we need to compute the derivatives of f(x) at x = 0.

Taking the derivatives of [tex]f(x) = ( {e}^{-6x} )[/tex]

we get:[tex]f'(x) ={ -6e}^{-6x} [/tex]

[tex]f''(x) = {36e}^{-6x} [/tex]

[tex]f'''(x) ={ -216e}^{-6x} [/tex]...

Evaluating these derivatives at x = 0,

we find:[tex]f(0) = e^0

= 1[/tex]f'(0)

= -6f''(0)

= 36f'''(0)

= -216...

Using these values,

the Maclaurin series for f(x) is:

[tex]f(x) = 1 - 6x + 36x^2 - 216x^3 + ...[/tex]

The associated radius of convergence for this Maclaurin series is infinite, which means the series converges for all values of x. This is because the exponential function [tex] {e}^{-6x} [/tex]converges for all real numbers x, and the series expansion captures the behavior of the function within that range.

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What is lim
x²-4?
X-2 X+2
O-4
O 0
04
ODNE

Answers

Answer:

A

Step-by-step explanation:

[tex]\lim_{x \to -2} \frac{x^{2}-4 }{x+2} \\\lim_{x \to -2} \frac{(x+2)(x-2)}{x+2}\\ \lim_{x \to -2} x-2\\= -4[/tex]

Answer:

First answer choice

[tex]- 4[/tex]

Step-by-step explanation:

[tex]\lim _{x\to \:-2}\left(\dfrac{x^2-4}{x+2}\right)\\\\\\\mathrm{Simplify}\:\dfrac{x^2-4}{x+2}\\\\\\\mathrm{Factor}\:x^2-4:\quad (x + 2)(x - 2)\\\\\lim _{x\to \:-2}\left(\dfrac{x^2-4}{x+2}\right) \\\\= \lim _{x\to \:-2}\left(\dfrac{x+2)(x-2)}{x+2}\right)[/tex]

The x+2 common factor cancels out

[tex]= \lim _{x\to \:-2}\left(x-2\right)\\\\\text{Plug in the value x= -2}\\\\= -2 - 2\\= -4[/tex]

In Problems 15 and 16, use the superposition principle to solve Laplace's equation (1) for a square plate subject to the given boundary conditions. 15. u(0, y) = 1, u(TT, y) = 1 u(x, 0) = 0, u(x, 7) = 1

Answers

The solution to Laplace's equation for the bottom side of the plate is u(x, y) = ∑[n=1 to ∞] 4/(nπ sinh(nπ)) [1 - cos(nπ)] sinh(nπ(T-y)/T) sin(nπx/T)

Let's start with the left side of the plate, where u(0, y) = 1. Since this is a constant potential, the solution to Laplace's equation is simply u(x, y) = 1.

Next, let's consider the right side of the plate, where u(TT, y) = 1. Again, the solution to Laplace's equation is u(x, y) = 1.

Moving on to the top side of the plate, where u(x, 0) = 0. We can use separation of variables to find the solution to Laplace's equation in terms of a Fourier series:

u(x, y) = ∑[n=1 to ∞] Bn sin(nπx/T) [tex]e^{-n\pi y/T}[/tex]

where T is the length of the side, and Bn are constants that depend on the boundary conditions. Since u(x, 0) = 0, we have:

Bn = 2/T ∫[0 to T] 0 sin(nπx/T) dx = 0

Therefore, the solution to Laplace's equation for the top side of the plate is:

u(x, y) = 0

Finally, let's consider the bottom side of the plate, where u(x, 7) = 1. Using separation of variables again, we find:

u(x, y) = ∑[n=1 to ∞] An sinh(nπ(T-y)/T) sin(nπx/T)

where An are constants that depend on the boundary conditions. Since u(x, 7) = 1, we have:

An = 2/ sinh(nπ) ∫[0 to T] sin(nπx/T) dx

Using trigonometric identities, we can evaluate this integral and obtain:

An = 4/(nπ sinh(nπ)) [1 - cos(nπ)]

Now, we can add these four solutions together to obtain the solution for the entire plate:

u(x, y) = 1 + ∑[n=1 to ∞] 4/(nπ sinh(nπ)) [1 - cos(nπ)] sinh(nπ(T-y)/T) sin(nπx/T)

This is the solution to Laplace's equation for a square plate with the given boundary conditions.

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In ΔVWX, w = 600 cm,

m∠V=26° and

m∠W=80°. Find the length of v, to the nearest 10th of a centimeter.

Answers

The length of v is given as follows:

v = 267.1 cm.

What is the law of sines?

The law of sines is used in the context of this problem as we have two sides and two opposite angles, hence it is the most straightforward way to relate the side lengths.

Each side length is related with the sine of the opposite angle as follows:

sin(A)/a = sin(B)/b = sin(C)/c.

The relation for this problem is given as follows:

sin(26º)/v = sin(80º)/600

Hence we apply cross multiplication to obtain the length v is obtained as follows:

sin(26º)/v = sin(80º)/600

v = 600 x sine of 26 degrees/sine of 80 degrees

v = 267.1 cm.

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write as a single integral in the form bf(x) dx.a2f(x) dx−5 3f(x) dx2 − −3f(x) dx−5

Answers

To write the given expression as a single integral, we can apply the linearity property of integration, which states that the integral of the sum of two functions is equal to the sum of their integrals.

Using this property, we get:

a^2 f(x) dx - 5 + 3 f(x) dx / 2 - (-3 f(x) dx / 5)

Now, we can simplify each term by multiplying and dividing by appropriate constants to get a common denominator of 10:

= (2a^2 f(x) - 50) / 10 + (15 f(x) - 6 f(x)) / 10 + (30 f(x) - (-3) f(x)) / 10

= (2a^2 f(x) + 9 f(x) + 33 f(x) - 50) / 10

= (2a^2 + 42) / 10

Therefore, the given expression can be written as the single integral:

∫ [(2a^2 f(x) + 9 f(x) + 33 f(x) - 50) / 10] dx

which simplifies to:

(2a^2 + 42) / 10 ∫ f(x) dx

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A standard bathtub holds 60 gallons of water. A full tub drains 12 gallons per minute. Which of the following tables best represent the situation

Answers

Answer:

The correct table represents the situation is shown in Table J.

Step-by-step explanation:

Table J shows the appropriate chart that most accurately depicts the circumstance.

What is a line equation?

The line's equation in the form of a slope through the points

the formula for (x1, y1) and (x2, y2) with slope m is;

⇒ y - y₁ = m (x - x₁)

In this case, m = (y2 - y1) / (x2 - x1)

Knowing that;

60 gallons of water can be found in a typical bathtub.

12 gallons per minute are also drained from a full bathtub.

From table J, now

is the rate of change,

⇒ (24 - 12) / (2 - 1)

⇒ 12 / 1

more than 12 gallons per minute

In the given circumstance, which.

Thus, Table J is the appropriate table that most accurately depicts the situation.

suppose z = f (x, y) and x = r 3 s y = re2s (a) find ∂z ∂s (write your answer in terms of r,s, ∂z ∂x , and ∂z ∂y .

Answers

The partial derivative of z with respect to s is $\frac{\partial z}{\partial s} = \frac{\partial f}{\partial x} r^3 + \frac{\partial f}{\partial y} 2re^{2s}$

The partial derivative of z with respect to s can be found using the chain rule of differentiation as follows:

$\frac{\partial z}{\partial s} = \frac{\partial z}{\partial x} \frac{\partial x}{\partial s} + \frac{\partial z}{\partial y} \frac{\partial y}{\partial s}$

Given that $x = r^3s$ and $y = re^{2s}$, we have:

$\frac{\partial x}{\partial s} = r^3$ and $\frac{\partial y}{\partial s} = 2re^{2s}$

Taking partial derivatives of z with respect to x and y:

$\frac{\partial z}{\partial x} = \frac{\partial f}{\partial x}$ and $\frac{\partial z}{\partial y} = \frac{\partial f}{\partial y}$

Hence, the partial derivative of z with respect to s is:

$\frac{\partial z}{\partial s} = \frac{\partial f}{\partial x} r^3 + \frac{\partial f}{\partial y} 2re^{2s}$

where $\frac{\partial f}{\partial x}$ and $\frac{\partial f}{\partial y}$ are the partial derivatives of f with respect to x and y, respectively.

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write an equivalent integral with the given order of integration ∫21∫z−10∫x0f(x,y,z)dydxdz=∫ba∫g(x)f(x)∫k(x,z)h(x,z)f(x,y,z)dydzdx

Answers

The equivalent integral is ∫ba∫0g(x)∫0k(x,z)f(x,y,z)h(x,z)dydzdx.

To obtain the equivalent integral, we need to rewrite the original integral limits and order of integration.

Starting from the innermost integral, we have ∫x=0^(z) f(x,y,z)dy, where y varies from 0 to z.

Moving to the second integral, we now have ∫z=1^(0) ∫x=0^(z) f(x,y,z)dydx, where z varies from 1 to 0 and x varies from 0 to z.

Finally, for the outermost integral, we have ∫z=1^(0) ∫x=0^(z) ∫y=0^(z) f(x,y,z)dydxdz, where z varies from 1 to 0, x varies from 0 to z, and y varies from 0 to z.

To obtain the equivalent integral in the desired order, we can change the limits of integration and rewrite the integrand as follows:

∫z=0^(b) ∫x=0^(g(z)) ∫y=0^(k(x,z)) h(x,z)f(x,y,z)dydzdx.

Finally, we can rearrange the order of integration to obtain the equivalent integral:

∫ba∫0g(x)∫0k(x,z)f(x,y,z)h(x,z)dydzdx.

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Please help offering 50 points

Answers

Answer:

D) 598 miles

--------------------------

Using the pair (10, 460) on the graph find the speed per hour:

460/10 = 46 mph

Find the distance after 13 hours:

13*46 = 598 miles

The matching choice is D.

A triangular prism and its dimensions are shown in the diagram.
496
440
The lateral surface area of the prism is
The total surface area of the prism is .._____
10 in
812
Complete each statement about the prism.
Move the correct answer to each box. Each answer may be used more than once. Not all answers will be used.
744
688
square inches.
12 in
square inches.
8 in
592
10 in
15.5 in

Answers

The lateral surface area of the triangular prism is 128 square centimeters. The correct answer would be an option (G) 128 cm².

Given, we have dimension are:

side length of base  = 6 cm, 5 cm, and 5 cm

height = 8 cm

Lateral surface area = (a+b+c)h

Substitute the values and we get

Lateral surface area = (6+5+5)8

Lateral surface area = 16 × 8

Lateral surface area = 128 cm².

Hence, the lateral surface area of the triangular prism is 128 square centimeters.

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The missing figure has been attached below.

Given a two-dimensional vector field F and a smooth oriented curve C, what is the meaning of the flux of F across C? Choose the correct answer below A. The flux of F across C is the sum of the components of F tangent to C at each point of C. B. The flux of F across C is the component of F tangent to C at a point P on C C. The flux of F across C is the component of F orthogonal or normal to C at a point P on C. D. The flux of F across C is the sum of the components of F orthogonal or normal to C at each point of C.

Answers

The correct answer is D. The flux of F across C is the sum of the components of F orthogonal or normal to C at each point of C.

The flux of a two-dimensional vector field F across a smooth oriented curve C represents the amount of the field that passes through the curve. In this context, the correct answer is: D. The flux of F across C is the sum of the components of F orthogonal or normal to C at each point of C. This means that the flux is calculated by considering the components of the vector field that are perpendicular to the curve at each point along C. By summing these orthogonal components, we can determine the overall quantity of the field that passes through the curve.

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Georgia runs 2.4 km in 10 minutes.
Work out her average speed in metres per second.

Answers

Georgia's average speed expressed in meter per seconds is 4m/s

Conversion of Units

To find the average speed in meters per second, we need to convert the distance and time to the appropriate units.

Converting distance from kilometers to meters :

1km = 1000m

2.4 km = (2.4 × 1000) = 2400 m

Converting time from minutes to seconds ;

1 minute = 60 seconds

10 minutes = (60 × 10) = 600 seconds

The average speed can be calculated using the formula:

Average speed = distance / time

Average speed = 2400/60 = 4

Therefore, Georgia's average speed is 4 meters per second.

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If f is a smooth function of two variables that is positive everywhere and F = Vf , which of the following statements about jĚ.dr is true? A) It is positive for all smooth paths C. B) It is zero for all smooth paths C. C) It is positive for all closed smooth paths C. D) It is zero for all closed smooth paths C. E) Both A and C are true.

Answers

The correct answer is E) Both A and C are true. In summary, the line integral jĚ.dr of a smooth, positive function f of two variables, where F = Vf, is positive for all smooth paths C and positive for all closed smooth paths C.

Explanation:

The line integral jĚ.dr represents the work done by the vector field F on a particle that moves along the path C. In this case, since F = Vf, we have jĚ.dr = VfĚ.dr. By the fundamental theorem of calculus for line integrals, we have:

jĚ.dr = VfĚ.dr = f(P) - f(Q)

where P and Q are the endpoints of the path C. Since f is positive everywhere, we have f(P) > f(Q), which implies that jĚ.dr is positive for all smooth paths C.

Moreover, since f is positive everywhere, we have f(P) > f(Q) for any two points P and Q on a closed path C. Therefore, jĚ.dr is positive for any closed smooth path C. This means that the vector field F is "circulation-preserving", meaning that the work done by F on a particle that moves around a closed loop is always positive.

In conclusion, both A and C are true, as jĚ.dr is positive for all smooth paths C and positive for all closed smooth paths C.

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PLEASE HELP QUICK 20 POINTS
Find the exact value
Sin -5pi/6

Answers

Answer:

1/2

Step-by-step explanation:

We can use the unit circle and reference angle to find the exact value of sin(-5pi/6).

Starting from the positive x-axis (θ=0), we can rotate clockwise by 5pi/6 radians to get to the terminal side of -5pi/6.

The reference angle is pi/6 radians, which is the angle between the terminal side and the x-axis if we rotate counterclockwise instead.

At this angle, sin is negative and equal to -1/2, since the opposite side has length 1 and the hypotenuse has length 2.

Since sin is an odd function, we have sin(-5pi/6) = -sin(5pi/6) = -(-1/2) = 1/2.

Therefore, the exact value of sin(-5pi/6) is 1/2.

What is the range of y=x^2-8x+12

Answers

Answer:

-infinity < x < infinity

Step-by-step explanation:

it has none.

which of the following expressions is true
A. 4³*4 by the power of 4= 4 by the power of 12
B. 5²*5³> 5 by the power of 5
C. 3²*3 by the power of 5 < 3 by the power of 8
D. 5²* 5 by the power 4 =5 by the power 8

Answers

The correct expressions are:

B. 5² × 5³ >[tex]5^5[/tex]

C. 3² × [tex]3^5 < 3^8[/tex]

Let's evaluate each expression:

A. 4³ × [tex]4^4 = 4^{12[/tex]

Simplifying the left side: [tex]4^3 \times 4^4 = 4^{(3+4) }= 4^7[/tex]

Comparing with the right side: [tex]4^7[/tex]≠ [tex]4^{12[/tex]

Therefore, expression A is not true.

B. 5² × 5³ > [tex]5^5[/tex]

Simplifying the left side: [tex]5^2 \times 5^3 = 5^{(2+3)} = 5^5[/tex]

Comparing with the right side: [tex]5^5 = 5^5[/tex]

Therefore, expression B is true.

C. 3² × [tex]3^5 < 3^8[/tex]

Simplifying the left side: [tex]3^2 \times 3^5 = 3^{(2+5) }= 3^7[/tex]

Comparing with the right side: [tex]3^7 < 3^8[/tex]

Therefore, expression C is true.

D. 5² × [tex]5^4 = 5^8[/tex]

Simplifying the left side: [tex]5^2 \times 5^4 = 5^{(2+4) }= 5^6[/tex]

Comparing with the right side: [tex]5^6[/tex] ≠ [tex]5^8[/tex]

Therefore, expression D is not true.

In conclusion, the correct expressions are:

B. 5² × 5³ >[tex]5^5[/tex]

C. 3² × [tex]3^5 < 3^8[/tex]

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1.a) In each case either show that G is a group with the given operation or list the axioms that fail.(a) G = N; addition(b) G = R; a · b = a + b + 1(c) G = {16, 12, 8, 4}; multiplication in Z20

Answers

(a) G = N; addition

To show that G = N (the set of natural numbers) under addition is a group, we need to verify the four group axioms:

Closure: For any a, b in N, a + b is also in N.

Associativity: For any a, b, c in N, (a + b) + c = a + (b + c).

Identity element: There exists an element 0 in N such that for any a in N, a + 0 = a.

Inverse element: For any a in N, there exists an element -a in N such that a + (-a) = 0.

Closure and associativity hold for addition on N, so we only need to verify the identity and inverse elements.

Identity element: The only possible identity element is 0, since adding any natural number to 0 gives that number. Thus, 0 is the identity element of (N, +).

Inverse element: For any a in N, there is no element -a in N such that a + (-a) = 0. Therefore, G = N under addition is not a group, because the inverse element axiom fails.

(b) G = R; a · b = a + b + 1

To show that G = R (the set of real numbers) under the given operation is a group, we need to verify the four group axioms:

Closure: For any a, b in R, a + b + 1 is also in R.

Associativity: For any a, b, c in R, (a + b + 1) + c = a + (b + c) + 1.

Identity element: There exists an element e in R such that for any a in R, a + e + 1 = a. Solving for e, we get e = -1, so -1 is the identity element of (R, ·).

Inverse element: For any a in R, there exists an element b in R such that a · b = e. Solving for b, we get b = -a - 2. Thus, for any a in R, -a - 2 is the inverse element of a.

Therefore, G = R under the given operation is a group.

(c) G = {16, 12, 8, 4}; multiplication in Z20

To show that G under multiplication modulo 20 is a group, we need to verify the four group axioms:

Closure: For any a, b in G, ab mod 20 is also in G.

Associativity: For any a, b, c in G, (ab)c mod 20 = a(bc) mod 20.

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Determine whether the following individual events are independent or dependent. Then find the probability of the combined event.
Randomly drawing and immediately eating two red pieces of candy in a row from a bag that contains
6
red pieces of candy out of
37
pieces of candy total.

Answers

The individual events of drawing and eating two red pieces of candy in a row from a bag are dependent. The probability of the second event is influenced by the outcome of the first event, since one red candy has already been removed from the bag.

The probability of drawing a red candy from the bag on the first attempt is 6/37. Once the first red candy has been drawn and eaten, there are now 5 red candies left in the bag out of 36 total candies. Therefore, the probability of drawing and eating a second red candy from the bag is now 5/36.

The probability of the combined event of drawing and eating two red candies in a row can be found by multiplying the probability of the first event by the probability of the second event, since the events are dependent:

P(drawing and eating two red candies in a row) = P(drawing a red candy on the first attempt) x P(drawing a red candy on the second attempt, given that a red candy was drawn on the first attempt)

P(drawing and eating two red candies in a row) = (6/37) x (5/36)

P(drawing and eating two red candies in a row) = 5/222

Therefore, the probability of drawing and eating two red candies in a row from the bag is 5/222 or approximately 0.0226.

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Try a similar question You can retry this question below After four years in college, Josie owes $24000 in student loans. The interest rate on the federal loans is 2.4% and the rate on the private bank loans is 3%. The total interest she owes for one year was $624.00. What is the amount of each loan?​

Answers

Answer:

$8000 in federal loans and $16000 in private bank loans.

Step-by-step explanation:

x + 16000 = 24000

x = 8000

y = 16000

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