A survey asked college students the number of week days they go to a live class on campus, # of days in class (x) 0 1 2 3 4 5 (P(x) 0.34 0.22 0.22 0.10 0.08 0.04 What is the probability a student attends a live class at least 2 days a week? What is the probability a student attends a live class less than 2 days a week?

The solution to dy/dx=1y is y=eˣ+C, where C is a constant.

This is found by separating the variables, integrating both sides, and solving for y. The constant C is determined by initial conditions or additional information about the problem.

This differential equation is a first-order linear homogeneous equation, meaning it can be solved using separation of variables. The solution shows that the rate of change of y is proportional to y itself, leading to exponential growth or decay depending on the sign of C.

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complete question:

The solution to  differential equation dy/dx=1y   is ?

Step-by-step explanation:

put in  -9    where 'x' is and compute

f(-9) = 3 ( -9)^2 -5 ( -9) + 4

       = 3 (81)  + 45 + 4

      = 292

[tex]\sf f(-9) = 292.[/tex]

[tex]\sf f(-9) = 3(-9)^{2} -5(-9)+4[/tex]

[tex]\sf f(-9) = 3(-9*-9) -5(-9)+4\\ \\f(-9) = 3(81) -5(-9)+4[/tex]

[tex]\sf f(-9) = 243 -(-45)+4\\ \\f(-9) = 243+45+4[/tex]

[tex]\sf f(-9) = 292.[/tex]

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Here are the journal entries for each scenario: (1) Usage of direct materials, including related variance (compound entry): Debit: Work-in-Process Inventory (standard cost).

   Debit: Material Price Variance (difference), Credit: Raw Materials Inventory (actual cost), (2). Incurrance and   assignment of direct labor costs, including related variances (compound entry): Debit: Work-in-Process Inventory (standard cost), Debit: Labor Rate Variance (difference)
  Credit: Salaries and Wages Payable (actual cost)

3. Actual manufacturing overhead costs incurred: Debit: Manufacturing Overhead
  Credit: Various Overhead Accounts (utilities, depreciation, etc.)

4. Overhead allocated to Work-in-Process Inventory:
  Debit: Work-in-Process Inventory
  Credit: Manufacturing Overhead

5. Movement of all production from Work-in-Process Inventory:
  Debit: Finished Goods Inventory (standard cost)
  Credit: Work-in-Process Inventory (standard cost)

6. Transfer the cost of sales at standard cost:
  Debit: Cost of Goods Sold (standard cost)
  Credit: Finished Goods Inventory (standard cost)

7. Adjusting the Manufacturing Overhead account (compound entry):
  Debit: Manufacturing Overhead (over- or under-applied amount)
  Debit/Credit: Cost of Goods Sold or Work-in-Process Inventory (depending on the disposition decision), Please note that these are generic entries and the exact amounts should be filled in based on your specific data.

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The distance to a star is inversely proportional to its parallax.

The distance to a star is related to its parallax through the following relationship: distance is inversely proportional to parallax. In other words, as the parallax increases, the distance to the star decreases, and vice versa.

This means that as the parallax angle (the apparent shift in position of the star when viewed from different points in Earth's orbit) decreases, the distance to the star increases. In other words, the smaller the parallax angle, the farther away the star is. This relationship is often expressed as the distance to the star being proportional to the reciprocal of its parallax angle, or distance ∝ 1/parallax.

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The area of the region enclosed by the functions f(x) = √x and g(x) = √x is 2/3 square units

The two functions f(x) = √x and g(x) = √x are identical, so they coincide with each other. Therefore, the region enclosed by the two functions is simply the area under the curve of one of the functions, from x = 0 to x = 1.

To find this area, we can integrate the function f(x) over the interval [0, 1]

∫₀¹ √x dx

We can simplify this integral by using the power rule of integration

∫₀¹ √x dx = [2/3 x^(3/2)] from 0 to 1

Plugging in the limits of integration, we get

[2/3 (1)^(3/2)] - [2/3 (0)^(3/2)] = 2/3 square units

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The given question is incomplete, the complete question is:

Find the area of the region enclosed by f(x)=√x and and g(x)=√x, Write an exact answer (fraction).

The series you're referring to is the sum from n=1 to infinity of (n⁸)/(3n⁹). To determine if it is convergent or divergent, we can use the Ratio Test.

Step 1: Compute the ratio of consecutive terms: (a_(n+1))/a_n = ((n+1)⁸)/(3(n+1)⁹) * (3n⁹)/(n⁸).

Step 2: Simplify the ratio: ((n+1)⁸)/(3(n+1)⁹) * (3n⁹)/(n⁸) = (n+1)⁸/(n+1)⁹ * (n⁹)/(n⁸) = 1/((n+1)(n)).

Step 3: Take the limit as n approaches infinity: lim (n→∞) 1/((n+1)(n)) = 0.

Since the limit is less than 1, the series converges by the Ratio Test.

In summary, the series ∑(n=1 to ∞) (n⁸)/(3n⁹) is convergent. The Ratio Test is used to determine this, by finding the limit of the ratio of consecutive terms, which is less than 1.

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The required answer is P(X=20) = 0.0919

To find the probability that Steph Curry shoots exactly 20 free throws (including the one he misses), we can use the binomial distribution formula:

P(X=k) = (n choose k) * p^k * (1-p)^(n-k)

Where:
- X is the number of successes (made free throws)
- k is the specific number of successes we are interested in (20)
- n is the total number of trials (free throws attempted)
- p is the probability of success (making a free throw)

Since Steph Curry is a 91% free-throw shooter, we know that p = 0.91. We also know that he will keep shooting free throws until he misses, which means that the number of trials is not fixed. However, we can still use the formula by setting n = 20 (the maximum number of free throws he could make before missing).
A probability is a way of assigning every event a value between zero and one, with the requirement that the event made up of all possible results (in our example, the event {1,2,3,4,5,6}) is assigned a value of one. To qualify as a probability, the assignment of values must satisfy the requirement that for any collection of mutually exclusive events (events with no common results, such as the events {1,6}, {3}, and {2,4}), the probability that at least one of the events will occur is given by the sum of the probabilities of all the individual events

Now, we just need to calculate P(X=20):

P(X=20) = (20 choose 20) * 0.91^20 * (1-0.91)^(20-20)
P(X=20) = 0.0919
So the probability that Steph Curry shoots exactly 20 free throws (including the one he misses) is approximately 0.0919, or 9.19%.

We are given that Steph Curry is a 91% free-throw shooter, which means he has a 91% chance of making each free throw and a 9% chance of missing one. We want to find the probability that he shoots exactly 20 free throws, including the one he misses.
probability that at least one of the events will occur is given by the sum of the probabilities of all the individual events

In uniform probability distributions, the likelihood of each possible outcome happening or not is the same. This property means that, for any given trial, the probability that an event will be successful does not change

Step 1: Calculate the probability of making the first 19 free throws. Since each free throw has a 91% chance of success, the probability is 0.91^19.

Step 2: Calculate the probability of missing the 20th free throw. This is a 9% chance or 0.09.

Step 3: Multiply the probability of making the first 19 free throws by the probability of missing the 20th one to find the overall probability. This is (0.91^19) * 0.09.

The probability that Steph Curry shoots exactly 20 free throws, including the one he misses, is approximately 0.0357 or 3.57%.

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The final coordinates after the given transformation is: A"'(-1, 2)

The coordinates of the triangle before transformation are:

A(-3, 1), B(3, 2) and C(1, -4)

Now, to rotate triangle ABC about the origin 90° clockwise we would follow the rule (x,y) → (y,-x),

Thus, we have:

A'(1, 3)

It is translated 2 units to the right and so we have:

A"(1 - 2, 3)

= A"(-1, 3)

Now it is moved by 1 unit downward and so we have:

A"'(-1, 3 - 1)

= A"'(-1, 2)

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The final coordinates after the given transformation is: A"'(-1, 2)

The coordinates of the triangle before transformation are:

A(-3, 1), B(3, 2) and C(1, -4)

Now, to rotate triangle ABC about the origin 90° clockwise we would follow the rule (x,y) → (y,-x),

Thus, we have:

A'(1, 3)

It is translated 2 units to the right and so we have:

A"(1 - 2, 3)

= A"(-1, 3)

Now it is moved by 1 unit downward and so we have:

A"'(-1, 3 - 1)

= A"'(-1, 2)

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The following can be answered by the concept of Sequence.

1. The sequence is decreasing as n increases. So, the answer is (b) decreasing.

2. The sequence is not bounded.

1. To determine whether the sequence is increasing, decreasing, or not monotonic, let's first examine the formula: an = 4n(-3). Simplifying this gives us an = -12n. Since the coefficient of n is negative, the sequence is decreasing as n increases. So, the answer is (b) decreasing.

2. To determine if the sequence is bounded, we need to see if there are upper and lower limits to the sequence. In this case, the sequence continues to decrease as n increases without any limit.

Therefore, the sequence is not bounded.

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Answer:  13, 3.43

Step-by-step explanation:

Pythagorean theorem is:

c²=a²+b²  

c is always the hypotenuse, the side that is longest or the side opposite of the right angle

a and b are the other 2 sides (for this it doesn't matter which is which

1.  c=x  a=12  b=5

x²=12²+5²         12² means (12)(12)=144 (12, 2 times)

x²=144+25        simplify by adding the numbers

x²=169            to solve for x take the √ of both sides

√x²=√169

x=13

2.  c=10.1    b=9.5   a=x

10.1²=9.5²+x²

102.01=90.25 +x²     subtract 90.25 from both sides

11.76=x²          take square root of both sides to solve for x

√x²=√11.76

x=3.43

Answer:  13, 3.43

Step-by-step explanation:

Pythagorean theorem is:

c²=a²+b²  

c is always the hypotenuse, the side that is longest or the side opposite of the right angle

a and b are the other 2 sides (for this it doesn't matter which is which

1.  c=x  a=12  b=5

x²=12²+5²         12² means (12)(12)=144 (12, 2 times)

x²=144+25        simplify by adding the numbers

x²=169            to solve for x take the √ of both sides

√x²=√169

x=13

2.  c=10.1    b=9.5   a=x

10.1²=9.5²+x²

102.01=90.25 +x²     subtract 90.25 from both sides

11.76=x²          take square root of both sides to solve for x

√x²=√11.76

x=3.43

The function g(x) that satisfies the given PDF of Y is g(x) = Y = 3x².

To find the function g(x), we need to use the transformation method. We know that Y = g(X), so we can use the following formula:

fY(y) = fX(x) * |dx/dy|

where fX(x) is the PDF of X, and |dx/dy| is the absolute value of the derivative of g(x) with respect to y.

In this case, X is a uniform random variable with parameters 0 and 1, so its PDF is:

fX(x) = 1 for 0 <= x <= 1, 0 otherwise.

Now we need to find g(x) such that fY(y) = 3y² for 0 <= y <= 1, 0 otherwise. Let's set g(x) = Y = 3x².

Then, we can find the derivative of g(x) with respect to y:

dy/dx = 6x

|dx/dy| = 1/|dy/dx| = 1/6x

Now we can substitute fX(x) and |dx/dy| into the formula:

fY(y) = fX(x) * |dx/dy|
fY(y) = 1 * 1/6x
fY(y) = 1/6(√y)

We can see that this matches the desired PDF of Y, which is 3y² for 0 <= y <= 1, 0 otherwise.

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The probability that the įth cup you are given has really salty water is 1/100.

We are given that;

Number of cups = 100

Now,

The probability of an event is the ratio of the number of favorable outcomes to the total number of possible outcomes1. In this case, the event is that the įth cup has really salty water, and there is only one favorable outcome out of 100 possible outcomes. Therefore, the probability is:

P(įth cup has really salty water) = 1/100

This probability is the same for any value of į from 1 to 100.

b. we need to find the expected value of the number of cups you drink before you encounter the really salty water. The expected value is the weighted average of all possible outcomes, where the weights are the probabilities of each outcome2. In this case, the possible outcomes are that you drink 1 cup, 2 cups, …, or 100 cups before you stop. The probability of each outcome depends on where the really salty water is located among the 100 cups.

Therefore, by probability the answer will be 1/100.

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The probability that more boys than girls are chosen is approximately 0.171.  

To solve this problem, we can use the binomial distribution. Let X be the number of boys chosen out of the 5 students selected.

Then, X has a binomial distribution with parameters n = 5 and p = 16/(16+19) = 16/35, since there are 16 boys and 19 girls, and we are selecting 5 students at random.

We want to find the probability that more boys than girls are chosen, which is the same as the probability that X is greater than 2. We can compute this probability using the cumulative distribution function (CDF) of the binomial distribution:

P(X > 2) = 1 - P(X ≤ 2)

= 1 - (P(X = 0) + P(X = 1) + P(X = 2))

Using the binomial probability formula, we can calculate each term of the sum:

P(X = k) = (n choose k) * p^k * (1 - p)^(n - k)

where (n choose k) = n! / (k! * (n-k)!) is the binomial coefficient.

Thus, we have:

P(X = 0) = (5 choose 0) * (16/35)^0 * (19/35)^5 = 0.107

P(X = 1) = (5 choose 1) * (16/35)^1 * (19/35)^4 = 0.349

P(X = 2) = (5 choose 2) * (16/35)^2 * (19/35)^3 = 0.373

Substituting these values into the formula for P(X > 2), we get:

P(X > 2) = 1 - (0.107 + 0.349 + 0.373) = 0.171

Therefore, the probability that more boys than girls are chosen is approximately 0.171.

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Okay, let's break this down step-by-step:

* 5 hot dogs and 4 hamburgers cost 13.25 total

* 4 hot dogs and 5 hamburgers cost 13.75 total

* So the difference between the two options is 0.5 (13.75 - 13.25 = 0.5)

* We have 9 items total in the first option and 9 items total in the second option

* So the difference of 0.5 must be due to the cost difference of either 1 hot dog or 1 hamburger

* Let's assume 1 hot dog costs x dollars

* Then, 5 hot dogs would cost 5x

* And 4 hot dogs would cost 4x

* So 5x + 4x = 13.25

* 9x = 13.25

* x = 1.5 (cost of 1 hot dog)

*

* Now let's look at the second option:

* 4 hot dogs would cost 4x = 4 * 1.5 = 6

* 5 hamburgers would cost y dollars each

* So 4x + 5y = 13.75

* 6 + 5y = 13.75

* 5y = 7.75

* y = 1.55 (cost of 1 hamburger)

So in summary:

The cost of one hot dog is $1.50

The cost of one hamburger is $1.55

Let me know if you have any other questions!

Answer:

probably about 10.24%

Step-by-step explanation:

The value of x for given problem is x = 2 or x = 75/11.

An equation is a mathematical statement that asserts the equality of two expressions. It typically consists of two sides, each containing one or more terms, with an equal sign in between them. The terms may include variables, constants, and mathematical operations such as addition, subtraction, multiplication, division, exponents, logarithms, and trigonometric functions.

Equations can be used to solve a wide range of mathematical problems, such as finding the roots of a polynomial, determining the slope and intercept of a linear function, or finding the optimal value of a function subject to certain constraints. Equations are also widely used in physics, engineering, economics, and other sciences to model and analyze complex systems.

To solve for x, we can use the identity sin(a) = cos(90 - a), which allows us to rewrite the equation as:

sin(10x + 17) = sin(90 - (12x + 29))

Using the identity sin(a) = sin(b) if and only if a = n180 + b or a = n180 - b, we can set up two equations:

10x + 17 = 90 - (12x + 29) or 10x + 17 = (12n - 90) - (12x + 29)

Simplifying each equation, we get:

22x = 44 or 22x = 12n - 162

For the first equation, solving for x gives:

x = 2

For the second equation, we can see that 12n - 162 must be even for x to be a real solution, since 22x must be an integer. This means that n must be odd. Letting n = 13, we get:

22x = 150

x = 75/11

Therefore, the solutions are:

x = 2 or x = 75/11.

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The critical value (zo) for the given test is 2.33. So, option A) is correct.

A critical value is the value of the test statistic which defines the upper and lower bounds of a confidence interval or defines the threshold of statistical significance in a statistical test.

Critical value can be defined as a value that is useful in checking whether the null hypothesis can be rejected or not by comparing it with the test statistic.

Based on the information provided, we can use a one-tailed z-test with a level of significance (α) of 0.01.

The formula for the critical value (zo) is:
zo = zα
where zα is the z-score corresponding to the level of significance (α).

Using a standard normal distribution table or calculator, we can find that the z-score for α = 0.01 is 2.33.

Therefore, the critical value (zo) for this test is 2.33.

Thus, option A) is correct.

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Answer:

19.5°

Step-by-step explanation:

to get the answer to this, you need to apply trigonometry

SOH CAH TOA

AB = hypotenuse

BC = opposite

AC = adjacent

we have the hypotenuse and the opposite so we use the equation SOH

sin⁻¹ (opp/hyp)

= sin⁻¹ ([tex]\frac{6}{18}[/tex])

= 19.47122....

= 19.5° (to the nearest tenth)

The requried volume of the triangular prism with the cylindrical hole is 2808 cm³.

The volume of the triangular prism without cylindrical whole is given as:
Volume = Area of triangular face * length of the prism

Volume = 25 * [1/2*15*20]
Volume = 3750 cm³

The volume of the cylindrical holes:

Volume = πr²h
             = 3.14*[4/2]²*25 = 314 cm³

Now, the volume of the triangular prism with the cylindrical hole is,
Volume = 3750 - 3 * 314
             = 2808 cm³

Thus, the requried volume of the triangular prism with the cylindrical hole is 2808 cm³.

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In mathematics, limits are used to describe the behavior of a function as its input values approach a certain value or infinity.

To find the limits of these expressions. Let's analyze each one step by step:
(a) lim (x→∞) (9x^3/2 - 4x^2 + 6)
In this case, as x approaches infinity, the term with the highest exponent (9x^3/2) will dominate the expression. The limit becomes:
lim (x→∞) (9x^3/2) = ∞

(b) lim (x→∞) (9x^3/2 - 4x^3/2 + 6)
For this expression, we can factor out x^3/2:
lim (x→∞) (x^3/2(9 - 4) + 6) = lim (x→∞) (5x^3/2 + 6)
As x approaches infinity, the term with the highest exponent (5x^3/2) will dominate the expression. The limit becomes:
lim (x→∞) (5x^3/2) = ∞

(c) lim (x→∞) (9x^3/2 - 4x + 6)
In this case, as x approaches infinity, the term with the highest exponent (9x^3/2) will dominate the expression. The limit becomes:
lim (x→∞) (9x^3/2) = ∞

In summary, the limits for all three expressions are:
(a) ∞
(b) ∞
(c) ∞

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The quadratic function in standard form that passes through the points (-6,0), (-4,0), and (-3,-18) is f(x) = -2x^2 + 4x + 4.

To write the quadratic function in standard form, we can use the fact that a quadratic function can be expressed as

f(x) = a(x - h)² + k,

where (h, k) is the vertex of the parabola and "a" is a constant that determines the shape of the parabola.

Since the graph passes through (-6, 0), (-4, 0), and (-3, -18), we can set up three equations based on these points and solve for the unknowns a, h, and k.

First, using the point (-6, 0), we get

0 = a(-6 - h)² + k

Expanding the square and simplifying, we get

36a + ah² + k = 0 ----(1)

Similarly, using the point (-4, 0), we get

0 = a(-4 - h)² + k

Expanding and simplifying, we get

16a + ah² + k = 0 ----(2)

Using the point (-3, -18), we get

-18 = a(-3 - h)² + k

Expanding and simplifying, we get

9a + 6ah + ah² + k = -18 ----(3)

We now have three equations with three unknowns (a, h, k). We can solve them simultaneously to get the values of a, h, and k.

Subtracting equation (1) from (2), we get

20a = -4ah²

Dividing by -4a, we get

-5 = h²

Taking the square root of both sides, we get

h = ±√5 i

Since "h" is a real number, we must have h = 0.

Substituting h = 0 in equations (1) and (2), we get

36a + k = 0 ----(4)

16a + k = 0 ----(5)

Subtracting equation (4) from (5), we get

20a = 0

Therefore, a = 0.

Substituting a = 0 in equation (4), we get

k = 0.

Thus, the quadratic function is

f(x) = 0(x - 0)² + 0

Simplifying, we get

f(x) = 0

Therefore, the graph is a horizontal line passing through the x-axis at x = -6, -4, and -3.

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The derivative dy/dx is (4x + y * sin x) / (cos x - 10y) when using implicit differentiation.

Step 1: Differentiate both sides of the equation with respect to x.
For the left side, use the product rule: (first function * derivative of the second function) + (second function * derivative of the first function). For the right side, differentiate term by term.
d/dx (y cos x) = d/dx (2x^2 + 5y^2)

Step 2: Apply the product rule and differentiate each term.
(dy/dx * cos x) - (y * sin x) = 4x + 10y(dy/dx)

Step 3: Solve for dy/dx.
First, move the terms containing dy/dx to one side of the equation:
dy/dx * cos x - 10y(dy/dx) = 4x + y * sin x

Next, factor out dy/dx:
dy/dx (cos x - 10y) = 4x + y * sin x

Finally, divide by (cos x - 10y) to isolate dy/dx:
dy/dx = (4x + y * sin x) / (cos x - 10y)

So, the derivative dy/dx is (4x + y * sin x) / (cos x - 10y) when using implicit differentiation.

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By using probability, the expected number of defective toys when selecting 2 toys at random from the table is 8/15.

To find the expected number of defective toys when selecting 2 toys at random from a table of 15 windup toys, we can use the concept of probability. There are a total of 15 toys, and 4 of them are defective. Thus, the probability of selecting a defective toy in the first pick is 4/15.

Once we have picked one toy, there are now 14 toys remaining on the table. If the first toy was defective, there are now 3 defective toys left among the 14. If the first toy was not defective, there are still 4 defective toys left among the 14.

The expected number of defective toys can be calculated as the sum of the probabilities of each possible outcome, multiplied by the number of defective toys in that outcome. There are two possible outcomes: (1) both toys are defective or (2) only one toy is defective.

(1) Probability of both toys being defective:
(4/15) * (3/14) = 12/210

(2) Probability of only one toy being defective:
a) First toy is defective, second toy is not: (4/15) * (11/14) = 44/210
b) First toy is not defective, second toy is: (11/15) * (4/14) = 44/210

The expected number of defective toys is the sum of the probabilities multiplied by the number of defective toys in each outcome:
(2 * 12/210) + (1 * 44/210) + (1 * 44/210) = 24/210 + 88/210 = 112/210

Simplifying the fraction, we get: 112/210 = 8/15.

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a) 100 fish were originally put into the pond.

b) After 10 years, the population of fish is≈780.33 fish.

after 20 years, it is≈1018.31 fish.

and after 30 years, it is≈1096.94 fish.

c) The population of fish approaches a constant value of 1200 fish as t becomes very large.

a) To find how many fish were originally put into the pond, we need to find the initial population at time t=0.

We can do this by substituting t=0 in the logistic growth model:

Therefore, 100 fish were originally put into the pond.

b) To find the population of fish after 10, 20, and 30 years, we can simply substitute the values of t in the logistic growth model:

Therefore,

c) To evaluate P(t) for large values of t, we need to find the limit of P(t) as t approaches infinity. We can do this by looking at the behavior of the exponential function [tex]e^{(-ct)}[/tex] as t becomes very large.

As t approaches infinity, [tex]e^{(-ct)}[/tex] approaches 0, so we can simplify the logistic growth model as follows:

Therefore, the population of fish approaches a constant value of 1200 fish as t becomes very large.

This is known as the carrying capacity of the pond, which is the maximum number of fish the pond can sustain.

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The flux of the vector field F=3x²y²zk through the surface S (cone √(x²+y²)=z, 0 ≤ z ≤ R, oriented downward) is (3πR⁵)/5.

To compute the flux, follow these steps:

1. Parameterize the surface: r(u,v) = (vcos(u), vsin(u), v), where 0≤u≤2π and 0≤v≤R.
2. Compute the partial derivatives: r_u = (-vsin(u), vcos(u), 0), r_v = (cos(u), sin(u), 1).
3. Compute the cross product: r_u × r_v = (-vcos(u), -vsin(u), v).
4. Evaluate F at r(u,v): F(r(u,v)) = 3(vcos(u))²(vsin(u))²(v).
5. Compute the dot product: F•(r_u × r_v) = 3v⁵cos²(u)sin²(u).
6. Integrate the dot product over the region: ∬(F•(r_u × r_v))dudv = (3πR⁵)/5.

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The distance d from the ship is equal to 11.911 miles.

In this problem we find the representation of a geometric system formed by two right triangles, in which we must determine the value of distance d from the ship, in miles. This can be resolved by means of the following trigonometric functions:

tan 49° = d / x

tan 38° = d / (20 - x)

Where d, x are measured in miles.

Now we proceed to compute distance d:

(20 - x) · tan 38° = d

(20 - d / tan 49°) · tan 38° = d

20 - (tan 38° / tan 49°) · d = d

20 = (1 + tan 38° / tan 49°) · d

d = 20 / (1 + tan 38° / tan 49°)

d = 11.911 mi

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Answer:

The owner buys used books for $1.50 each and resells them for 400% of what he paid for them, which is the same as saying he multiplies the purchase price by 4.

So, the selling price of each used book is:

4 x $1.50 = $6.00

Therefore, the price of a used book in this bookstore is $6.00.

The answer is (J) $6.00.    

have a good day and stay safe

Answer:

J 6.00

Step-by-step explanation:

1.50*400% which is equal to 1.50*4 which in turn is equal to $6.00.

I hope you liked my explanation

The maximum likelihood estimator for θ is 6θ = 6(X/n).

To find the maximum likelihood estimator for θ, we need to find the likelihood function first.

The likelihood function is given by:

L(θ | x) = f(x1, x2, . . . , xn | θ)

where f is the probability density function of the normal distribution with mean θ and variance σ2.

Using the density function of normal distribution, we get:

L(θ | x) = (2πσ2)^(-n/2) * exp(-(1/2σ2) * ∑(xi-θ)^2)

To find the maximum likelihood estimator, we need to maximize this likelihood function with respect to θ.

Taking the derivative of the likelihood function with respect to θ and setting it to zero, we get:

d/dθ (L(θ | x)) = (1/σ2) * ∑(xi-θ) = 0

Solving for θ, we get:

θ = (1/n) * ∑xi = X/n

Therefore, the maximum likelihood estimator for θ is 6θ = 6(X/n).

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(a) The volume of the prism is 144 cubic units. (b) Area of shaded base is 16 square units. Volume of prism is 144 cubic units. Both methods give the same result for the volume of the prism.

A rectangular prism is a three-dimensional geometric figure that consists of six rectangular faces that meet at right angles. It is also known as a rectangular cuboid or a rectangular parallelepiped. The rectangular prism is a special case of a parallelepiped, where all six faces are rectangles.

The rectangular prism has three pairs of parallel faces, each pair being congruent to each other. The length, width, and height of a rectangular prism are its three dimensions, and they are usually denoted as l, w, and h respectively.

(a) The expression to find the volume of the prism is:

Volume of prism = length x width x height

Substituting the given values, we get:

Volume of prism = 8 x 2 x 9 = 144 cubic units

(b) The shaded base of the prism is a rectangle with dimensions 8 by 2. Therefore, the area of the shaded base is:

Area of shaded base = length x width = 8 x 2 = 16 square units

We can also find the volume of the prism by multiplying the area of the shaded base by the height of the prism. The expression to find the volume of the prism using the area of the shaded base is:

Volume of prism = area of shaded base x height

Substituting the values, we get:

Volume of prism = 16 x 9 = 144 cubic units

As expected, both methods give the same result for the volume of the prism.

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Center of mass of the given system of point masses is (-5, 1).

We need to find the coordinates (x, y), where:

x = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3)

y = (m1y1 + m2y2 + m3y3) / (m1 + m2 + m3)

Here, we have three point masses with coordinates (x1, y1) = (-7, -3), (x2, y2) = (0, 0), and (x3, y3) = (-1, 6), and masses m1 = 8, m2 = 1, and m3 = 4.

Plugging in the values, we get:

x = (8(-7) + 1(0) + 4(-1)) / (8 + 1 + 4) = -5

y = (8(-3) + 1(0) + 4(6)) / (8 + 1 + 4) = 1

Therefore, the center of mass of the given system of point masses is (-5, 1).To find the center of mass, we need to find the coordinates (x, y), where:

x = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3)

y = (m1y1 + m2y2 + m3y3) / (m1 + m2 + m3)

Here, we have three point masses with coordinates (x1, y1) = (-7, -3), (x2, y2) = (0, 0), and (x3, y3) = (-1, 6), and masses m1 = 8, m2 = 1, and m3 = 4.

Plugging in the values, we get:

x = (8(-7) + 1(0) + 4(-1)) / (8 + 1 + 4) = -5

y = (8(-3) + 1(0) + 4(6)) / (8 + 1 + 4) = 1

Therefore, the center of mass of the given system of point masses is (-5, 1).

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