Calc II Question

Use the method of cylindrical shells to find the volume generated by rotating the region bounded by the given curves about the y axis.
Y = e^(-x^2)
Y = 0
X = 0
X = 1

Correct answer is pi (1 - (1/e))
I'm just not sure how to get to that answer

Answer:

Step-by-step explanation:

Given x=3, [tex]\sqrt{2}[/tex], and -4i

y= (x-3)([tex]x^{2}[/tex]-2)([tex]x^{2}[/tex]+16)

Answer:

x^4 - 3x^3 - 16√2x^2 + (16√2 + 16)x - 48 = 0

Step-by-step explanation:

If the roots of a polynomial equation are 3, √2 and -4i, then the factors of that polynomial are (x - 3), (x - √2) and (x + 4i), since each factor represents one of the roots.

However, since -4i is a complex number, its conjugate 4i is also a root of the polynomial. So we also need the factor (x - 4i).

Thus, the polynomial equation is:

(x - 3) (x - √2) (x + 4i) (x - 4i) = 0

To simplify this equation, we can use the fact that (a + bi)(a - bi) = a^2 - b^2i^2 = a^2 + b^2:

(x - 3) (x - √2) (x^2 + 16) = 0

Expanding this equation yields:

x^4 - 3x^3 + 16x - 16√2x^2 + 48√2x - 48 = 0

So the polynomial equation with roots 3, √2, and -4i is:

x^4 - 3x^3 - 16√2x^2 + (16√2 + 16)x - 48 = 0

Answer:

850

Step-by-step explanation:

Our given expression is [tex]8.5*10^{2}[/tex]

To solve, simply use PEMDAS as it applies to the expression.

First, you do the exponent(s): [tex]10^2 = 100[/tex]

Then, you do multiplication: [tex]8.5*100=850[/tex]

So, your answer is 850.

Answer:

This equation is always false

Step-by-step explanation:

3(x - 4) + 2x = 5x  - 9

3x - 12 + 2x = 5x -9

5x - 12 = 5x - 9

5x - 5x = -9 + 12

0 = 3

This equation is always false

Answer: [-2,7]

Step-by-step explanation: The range of a graph is just the range of minimum and maximum outputs of the y axis. The minimum y axis value is -2, while the maximum is 7. Putting your answer in brackets means that the endpoints (-2 and 7) are inclusive, which is the case since the dots are filled in. If the dots are hollow, the range does not include those endpoints and you would use parentheses instead.

Answer:

We have to multiply everything to find the amount of different possible outcomes so 3*7*8*4 = 672 unique outfits

Step-by-step explanation:

Hope this helps!

Reason:

Tangent is the ratio of opposite over adjacent.

The side 'a' is opposite reference angle 52, while c is adjacent to this angle.

Using a calculator, tan(52) = 1.27994 approximately.

Answer:

Tan 52°

Step-by-step explanation:

Since the Tangent of angle is given by the ratio of opposite to the adjacent.

So, Here

Tan 52°= opposite/adjacent

Tan 52°=a/c

Therefore, the ratio of a/c is Tan 52°

The ordered pair that is a solution for both inequalities is (-2, 2).

Here we have the system of inequalities:

y < -x + 1

y > x

And we want to see which one of the given points makes both of them true.

To find that, just replace the values in both inequalities and see if both become true or not.

For example, for the first point:

(-3, 5)

We will get:

5 < -(-3) + 1 = 4

5 > -3

The first one is false, and the second one is true.

The correct option is the second point:

2 < -(-2) +1 = 3

2 > -2

Both are true.

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A. The distribution of X can be represented as X ~ N(μ, σ). B. 1918 is the sample mean. C. The probability that a randomly selected district had fewer than 2009 votes for President Clinton is approximately 0.5641.

D. The probability is approximately 0.0725.

E. The first quartile for votes for President Clinton is approximately 1544.

a. The distribution of X is normally distributed. Therefore, the distribution of X can be represented as X ~ N(μ, σ), where μ is the mean and σ is the standard deviation.

b. In this context, 1918 is the sample mean. It represents the average number of votes per district in the sample of 40 election districts in Alaska.

c. To find the probability that a randomly selected district had fewer than 2009 votes for President Clinton, we need to calculate the z-score and then use the standard normal distribution table (or a calculator with a normal distribution function). The z-score can be calculated as follows:

z = (x - μ) / σ

where x is the value we're interested in (2009 votes), μ is the population mean (1918 votes), and σ is the standard deviation (554 votes).

z = (2009 - 1918) / 554 ≈ 0.164

Using the standard normal distribution table or a calculator, we can find that the probability corresponding to a z-score of 0.164 is approximately 0.5641.

Therefore, the probability that a randomly selected district had fewer than 2009 votes for President Clinton is approximately 0.5641.

d. To find the probability that a randomly selected district had between 1955 and 2056 votes for President Clinton, we need to calculate the z-scores for both values and then use the standard normal distribution table.

For 1955 votes:

z1 = (1955 - 1918) / 554 ≈ 0.066

For 2056 votes:

z2 = (2056 - 1918) / 554 ≈ 0.248

Using the standard normal distribution table or a calculator, we can find the cumulative probabilities corresponding to z1 and z2. Then, we subtract the cumulative probability for z1 from the cumulative probability for z2 to find the probability between these two values.

P(1955 < X < 2056) = P(X < 2056) - P(X < 1955)

Using the standard normal distribution table or a calculator, we can find these probabilities and subtract them to find the desired probability.

P(1955 < X < 2056) = P(X < 2056) - P(X < 1955)

≈ 0.5989 - 0.5264

≈ 0.0725

So, the probability is approximately 0.0725.

e. The first quartile corresponds to the 25th percentile of the distribution. To find the first quartile for votes for President Clinton, we need to find the value of X such that 25% of the districts have fewer votes.

Using the standard normal distribution table or a calculator, we can find the z-score corresponding to the 25th percentile, which is -0.6745. Then we can calculate the value of X using the z-score formula:

-0.6745 = (X - 1918) / 554

Solving for X:

X - 1918 = -0.6745 × 554

X - 1918 = -374.167

X ≈ 1543.833

Rounding to the nearest whole number, the first quartile for votes for President Clinton is approximately 1544.

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Answer:

63

Step-by-step explanation:

Given the expression:

[tex]\displaystyle{x^2+3x-7}[/tex]

Substitute x = -7:

[tex]\displaystyle{7^2+3(7)-7}[/tex]

Evaluate:

[tex]\displaystyle{(7)(7)+3(7)-7}\\\\\displaystyle{=49+21-7}\\\\\displaystyle{=63}[/tex]

"1/49," accurately represents the result of Urvi's work.The correct answer is option D.

Urvi's work is accurate and follows the correct rule of "multiply by the reciprocal" to solve the fraction division problem.

In the given problem, she is dividing 14 by the fraction 2/7. According to the rule, to divide a fraction by another fraction, we multiply the first fraction by the reciprocal of the second fraction.

In Urvi's work, she first takes the reciprocal of 2/7, which is 7/2. Then, she multiplies 14 by the reciprocal, which gives us (14 * 7/2).

Simplifying the multiplication, we get 98/2, which simplifies further to 49. Therefore, the correct answer to the fraction division problem is 1/49.

Option D, which states "1/49," accurately represents the result of Urvi's work. This option is the most accurate description of her work because it correctly shows the final simplified fraction after applying the "multiply by the reciprocal" rule.

Overall, Urvi's work demonstrates a correct understanding and application of the rule for solving fraction division problems.

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The Probable question may be:
Urvi solved a fraction division problem using the rule “multiply by the reciprocal.” Her work is shown below.

A StartFraction 14 divided by StartFraction 2 Over 7 EndFraction.

B. StartFraction 1 Over 14 EndFraction times

C. StartFraction 2 Over 7 EndFraction = StartFraction 2 Over 98

D. EndFraction or StartFraction 1 Over 49 EndFraction

Which is the most accurate description of Urvi’s work?

Answer:

please i can only give you tips on how to solve it

divide the shape into 3 i.e triangle rectangle and triangle using their formula

rectangle = l×b

triangle= 1/2b×h

then multiply the three soln

The volume of the square based pyramid would be =60cm³.

To calculate the volume of a square based pyramid, the formula that should be used would be given below as follows;

Volume = 1/3× base²× height

where base length = 6cm

height = 5cm

Volume = 1/3× 6×6×5

= 60cm³

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Answer:

? = 92°

Step-by-step explanation:

the chord- chord angle ? is half the sum of the measures of the arcs intercepted by the angle and its vertical angle, that is

? = [tex]\frac{1}{2}[/tex] (LM + AK) = [tex]\frac{1}{2}[/tex] (120 + 64)° = [tex]\frac{1}{2}[/tex] × 184° = 92°

The surface area of the cone is: 213.66 cm²

The volume of a cone is: 7.33 cm³

The formula for the surface area of a cone is:

T.S.A = πrl + πr²

where:

r is radius

l is slant length

From the diagram and using Pythagoras theorem,we have:

l = √(7² + 5²)

l = √74

Thus:

TSA =  (π * 5 * √74) + (π * 5²)

TSA = 213.66 cm²

Formula for the volume of a cone is:

V = ¹/₃πr²

V = ¹/₃π * 7

V = 7.33 cm³

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The incorrect phrases in the paragraph are as follows:

Since ∠AMC is a right angle,  ∠BMC and  ∠CMD are complementary.

Since  ∠BMD is a right angle,  ∠AMB and  ∠BMC are complementary.

To identify the wrong phrases, note that a right angle is an angle that forms 90° when inclined to another line. Also, complementary angles are those whose sum is 90°.

A close look at the angles will show that ∠BMD is a right angle but ∠BMC and  ∠CMD are complementary. Also, the following is correct: ∠AMC is a right angle,  ∠AMB and  ∠BMC are complementary.

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Answer:

880g of flour

Step-by-step explanation:

A ratio has two or more numbers that symbolize relation to each other. Ratios are used to compare numbers, and you can compare them using division.

The ratio the baker uses (strawberries: flour) is:

Adding the two of these together gives us:

This means that for 1 batch of cakes, 260g of flour and strawberries is needed in total.

Now that we know that, we can take 1040g and divide that by 260g.

1040g ÷ 260g = 4

This means that the baker made 4 batches of cakes using 1040g total.

Taking the amount of flour and multiplying that by 4 to get the amount of flour used:

220g × 4 = 880g

Therefore the baker uses 880g of flour for every 1040g total.

The vertex of the parabola is located at (-1, -2).To identify the vertex of the parabola given the points (-2, -1), (-3, 2), (-1, -2), and (1, 2), we can use the fact that the vertex of a parabola is the highest or lowest point on the graph.

From the given points, we can observe that the y-coordinate of the vertex will be either the highest or lowest among the y-coordinates of the points.By examining the y-coordinates, we see that the point (-3, 2) has the highest y-coordinate of 2, while the point (-1, -2) has the lowest y-coordinate of -2.

Therefore, the vertex of the parabola is the point (-1, -2), as it is the lowest point on the graph. The x-coordinate of the vertex is -1, and the y-coordinate is -2.

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Answer:

-2(3x + 12y - 5 - 17x - 16y + 4)

-6x - 24y + 10 + 34x + 32y - 8

-6x + 34x - 24y + 32y + 10 - 8

28x + 8y + 2

The correct statement regarding the translation in this problem is given as follows:

A. The graph of g(x) is the graph of f(x) shifted up 3 units.

A translation happens when either a figure or a function is moved horizontally or vertically on the coordinate plane.

The four translation rules for functions are defined as follows:

In this problem, we have an addition by 3, hence there is a translation up 3 units.

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To find the local and absolute maximum and minimum points of the function f(x) = (3/5)x^5 - 9x^3 + 2 on the closed interval [-4,5], we need to follow these steps:

a) Find all critical numbers (x-coordinates only):

To find the critical numbers, we need to identify where the derivative of the function is zero or undefined. Let's find the derivative of f(x) first:

f'(x) = 3x^4 - 27x^2

Now, set the derivative equal to zero and solve for x:

3x^4 - 27x^2 = 0

Factoring out a common factor of 3x^2, we get:

3x^2(x^2 - 9) = 0

This equation is satisfied when either 3x^2 = 0 or x^2 - 9 = 0.

For 3x^2 = 0, we have x = 0.

For x^2 - 9 = 0, we have x = -3 and x = 3.

Therefore, the critical numbers (x-coordinates) are 0, -3, and 3.

b) Find the intervals on which the graph is increasing (mark critical numbers):

To determine the intervals of increasing, we need to analyze the sign of the derivative on each side of the critical numbers. We create a sign chart for f'(x):

Interval (-∞, -3): Choose a test point x < -3, e.g., x = -4

f'(-4) = 3(-4)^4 - 27(-4)^2 = 768 > 0

The derivative is positive, indicating the graph is increasing.

Interval (-3, 0): Choose a test point x between -3 and 0, e.g., x = -1

f'(-1) = 3(-1)^4 - 27(-1)^2 = -24 < 0

The derivative is negative, indicating the graph is decreasing.

Interval (0, 3): Choose a test point x between 0 and 3, e.g., x = 1

f'(1) = 3(1)^4 - 27(1)^2 = -24 < 0

The derivative is negative, indicating the graph is decreasing.

Interval (3, ∞): Choose a test point x > 3, e.g., x = 4

f'(4) = 3(4)^4 - 27(4)^2 = 768 > 0

The derivative is positive, indicating the graph is increasing.

Therefore, the graph is increasing on the intervals (-∞, -3) and (3, ∞).

c) Find the intervals on which the graph is decreasing (mark critical numbers):

From the analysis above, we can see that the graph is decreasing on the intervals (-3, 0) and (0, 3).

d) Find all local maximum points:

To find the local maximum points, we need to examine the points where the graph changes from increasing to decreasing. By observing the sign changes in the derivative, we can identify potential local maximum points.

From our analysis in part b, we can see that the graph changes from increasing to decreasing at x = -3 and x = 0. Therefore, these are the local maximum points.

e) Find all local minimum points:

To find the local minimum points, we need to examine the points where the graph changes from decreasing to increasing. By observing the sign changes in the derivative, we can identify potential local minimum points.

From our analysis in part c, we can see that the graph changes.

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Answer:

The table shows that there are a total of 142 books on Diana's bookshelf, with 77 books written by female authors and the rest by male authors. However, the number of non-fiction books written by female authors is missing from the table, so it is impossible to determine the exact number without more information.

Step-by-step explanation:

Answer:

104 books

Step-by-step explanation:

                 Fiction         Non-Fiction      Total

Male              36                     38

Female                                    x

Total              77                     142

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

x = 142 - 38 = 104

Answer:

a

Step-by-step explanation:

Answer:

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

Area is the product of two dimensions hence the ratio of areas of similar figures is the square of the scale factor.

Let the area of the enlarged shape be A, and the scale factor be k = 6.

Then we have the area of the larger shape:

Using Gauss-Jordan method, the value of x, y and z are 0, -2 and 1

To solve the system of equations using the Gauss-Jordan method, we'll perform row operations to transform the augmented matrix into row-echelon form and then further transform it into reduced row-echelon form. Here are the steps:

1. Write the augmented matrix for the system of equations:

  [1  -2   4  |  20]

  [1   1  13  | -31]

  [-2   6  -1 | -69]

2. Perform row operations to transform the matrix into row-echelon form:

  R2 = R2 - R1

  R3 = R3 + 2R1

  [1  -2   4  |  20]

  [0   3   9  | -51]

  [0   2   7  | -29]

3. Perform row operations to further transform the matrix into reduced row-echelon form:

  R2 = R2 / 3

  R3 = R3 - 2R2

  [1  -2   4  |  20]

  [0   1   3  | -17]

  [0   0   1  |   1]

4. Perform row operations to obtain a diagonal of 1s from left to right:

  R1 = R1 + 2R2 - 4R3

  R2 = R2 - 3R3

  [1  0  0  |   0]

  [0  1  0  |  -2]

  [0  0  1  |   1]

The resulting matrix corresponds to the system of equations:

x = 0

y = -2

z = 1

Therefore, the solution to the given system of equations is x = 0, y = -2, and z = 1.

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Answer:

The sixth angle is 115°.

Step-by-step explanation:

Number of sides in a hexagon = n =6

Sum of interior angles = (n−2)180°

= (6−2)180 ∘

= 720

∴ Let the six angle of hexagon be x.

⇒ x + 123 + 124 + 118 + 130 + 110 = 720°

⇒ x + 605 = 720°

⇒ x = 720 - 605

⇒ x = 115

Answer:

x = 1 or

x = 1/2

Step-by-step explanation:

2x² - 5 = 3x - 6

⇒ 2x² - 5 - 3x + 6 = 0

⇒ 2x² - 3x + 1 = 0

Using quadratinc formula, the roots are

[tex]\frac{-b \pm\sqrt{b^{2} -4ac } }{2a}[/tex]

where, a = 2, b = -3 and c = 1

sub in the formula,

[tex]\frac{-(-3) \pm\sqrt{(-3)^{2} -4(2)(1) } }{2(2)}\\\\= \frac{3 \pm\sqrt{9 -8 } }{4}\\\\= \frac{3 \pm\sqrt{1 } }{4}\\\\= \frac{3 \pm 1 }{4}\\\\= \frac{3+1}{4} \;or\; \frac{3-1}{4}\\ \\=\frac{4}{4} \; or\; \frac{2}{4} \\\\= 1 \; or \; \frac{1}{2}[/tex]

The vertex for the graph of the equation [tex]v - 3 = - (x+2)^2 is (-2, 3).[/tex]

To find the vertex of the graph of the equation [tex]v - 3 = - (x+2)^2,[/tex] we can rewrite it in the standard vertex form: [tex]v = a(x - h)^2 + k,[/tex]

where (h, k) represents the vertex coordinates.

First, let's rearrange the given equation:

[tex]v - 3 = - (x+2)^2[/tex]

[tex]v = - (x+2)^2 + 3[/tex]

Comparing this with the standard vertex form, we can see that h = -2 and k = 3.

Therefore, the vertex of the graph is (-2, 3).

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[tex]\displaystyle \text{To solve this problem, let's assume the distance of the run is denoted by 'x' miles, and the distance of the bicycle race is denoted by '48 - x' miles.}[/tex]

[tex]\displaystyle \text{We can use the formula: time} = \text{distance/velocity to find the time taken for each segment of the race.}[/tex]

[tex]\displaystyle \text{For the run:}[/tex]

[tex]\displaystyle \text{Time taken} = \text{Distance/Velocity}[/tex]

[tex]\displaystyle t_1 = \frac{x}{5}[/tex]

[tex]\displaystyle \text{For the bicycle race:}[/tex]

[tex]\displaystyle \text{Time taken} = \text{Distance/Velocity}[/tex]

[tex]\displaystyle t_2 = \frac{48 - x}{23}[/tex]

[tex]\displaystyle \text{Given that the total time for the race is 6 hours, we can write the equation:}[/tex]

[tex]\displaystyle t_1 + t_2 = 6[/tex]

[tex]\displaystyle \text{Substituting the expressions for } t_1 \text{ and } t_2, \text{ we get:}[/tex]

[tex]\displaystyle \frac{x}{5} + \frac{48 - x}{23} = 6[/tex]

[tex]\displaystyle \text{To solve this equation, we can simplify it by multiplying through by the common denominator, which is 115:}[/tex]

[tex]\displaystyle 23x + 5(48 - x) = 6 \times 115[/tex]

[tex]\displaystyle \text{Simplifying further:}[/tex]

[tex]\displaystyle 23x + 240 - 5x = 690[/tex]

[tex]\displaystyle 18x = 450[/tex]

[tex]\displaystyle x = \frac{450}{18}[/tex]

[tex]\displaystyle x = 25[/tex]

[tex]\displaystyle \text{Therefore, the distance of the run is 25 miles, and the distance of the bicycle race is } 48 - 25 = 23 \text{ miles.}[/tex]

The examples match with the following properties:

1. C. Distributive Property

2. A. Commutative Property

3. B. Associative Property

4. B. Associative Property

The correct matching of the examples on the left with the corresponding properties on the right is as follows:

1. 3(x + 3) = 3x + 9 : C. Distributive Property

  This example demonstrates the distributive property, where we distribute the factor 3 to both terms inside the parentheses, resulting in 3 times x and 3 times 3, which simplifies to 3x + 9.

2. 2 + 3 + 4 = 4 + 3 + 2 : A. Commutative Property

  This example illustrates the commutative property of addition, which states that the order of adding numbers does not affect the sum. Here, the numbers are rearranged on both sides of the equation, but the sum remains the same.

3. 4(2 x 3) = (4 x 2)3 : B. Associative Property

  This example showcases the associative property of multiplication, where the grouping of factors does not affect the product. The expression on the left side is calculated as 4 times the product of 2 and 3, while the expression on the right side is calculated as the product of 4 and 2, followed by multiplying the result by 3. Both calculations yield the same result.

4. 6 + (7 + x) = (6 + 7) + x : B. Associative Property

  This example also demonstrates the associative property, but in the context of addition. The expression on the left side associates the addition of 7 and x first, while the expression on the right side associates the addition of 6 and 7 first. Both expressions ultimately add up to the same sum.

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The question probable may be:

Match the example on the left with the corresponding property on the right.

1. 3(x + 3) = 3x + 9

2. 2 + 3 + 4 = 4 + 3 +2.

3. 4(2 x 3) = (4 x 2)3

4. 6 + (7 + x) = (6 + 7) + x

A. Commutative Property

B. Associative Property

C. Distributive Property