1. For the following regions, find a simpler expression for each region by using a different coordinate system. (a) D:= {(x, y) : 1 ≥ 0, and x^2 + y^2 ≤ 9}(b) D:= {(x, y) in the first quadrant: 4 ≤ x^2 + y^2 }(c) D:= {(x, y) : x ≤ 0, y ≥ 0, and 36 ≤ x^2 + y^2 ≤ 49}(d) D:= {(x, y) : x ≥ 0, y ≤ 0, and 36 ≤ x^2 + y^2 ≤ 49}(e) D:= {(x, y, z) in the first octant x^2 + y^2 ≤ 100}(f) Ω:= {(x, y, z) in the first octant x^2 + y^2 + z^2 ≤ 100}(g) Ω:= {(x, y, z) : √x^2 + y^2 ≤ z and x^2 + y^2 + z^2 ≤ 4}(h) Ω:= {(x, y, z) : √x^2 + y^2 ≤ z and z ≤ 4}(i) Ω:= {(x, y, z) : z ≤ - √x^2 + y^2 and x^2 + y^2 + z^2 ≤ 4}(j) Ω:= {(x, y, z) : -4 ≤ z ≤ - √x^2 + y^2}

The differential value dy for the function y = (x²+2)³ when x=3, dx=0.4 and x=3 , dx=0.05 is equal to 871.2 and 108.9 respectively.

Function is equal to,

y = (x²+2)³

The differential dy, use the formula for the differential of a function,

dy = f'(x) dx

where f'(x) is the derivative of f(x) with respect to x,

and dx is the change in x.

First, the derivative of y = (x²+2)³using the chain rule,

dy/dx = 3(x²+2)² × 2x

Now, plug in x=3 and dx=0.4 to find the differential dy,

dy = (3(3²+2)² × 2(3)) × 0.4

= 871.2

when x=3 and dx=0.4, the differential dy is approximately 871.2.

Similarly, for x=3 and dx=0.05, we have,

dy = (3(3²+2)² × 2(3)) × 0.05

= 108.9

Therefore, when x=3, dx=0.4 and x=3 , dx=0.05 the differential dy is approximately 871.2 and 108.9 respectively.

learn more about differential here

brainly.com/question/2253945

#SPJ4

The regression equation y = 2.33476556 + 0.39047264x on your TI-84 calculator to predict the stock price based on the prime interest rate. Keep in mind that this is just a prediction and real-world factors may lead to different results.

The TI-84 calculator provides a linear regression model for predicting the price of a certain stock (y) based on the prime interest rate in per cent (x). The least squares regression line equation is given by:

y = a + bx

In this case, the values of 'a' and 'b' have been calculated as:

a = 2.33476556
b = 0.39047264

So, the regression equation becomes:

y = 2.33476556 + 0.39047264x

The coefficient of determination, r^2, is given as 0.4537931265, which indicates that about 45.38% of the variation in the stock price can be explained by the prime interest rate.

The correlation coefficient, r, is 0.67364169. Since this value is positive, it shows a positive relationship between the prime interest rate and the stock price. In other words, as the prime interest rate increases, the stock price is likely to increase as well.

In summary, you can use the regression equation y = 2.33476556 + 0.39047264x on your TI-84 calculator to predict the stock price based on the prime interest rate. Keep in mind that this is just a prediction and real-world factors may lead to different results.

Learn more about Regression here:

brainly.com/question/30011167

#SPJ11

The critical point is  (B/12, 1/12) and  f(x,y) has a saddle point at (B/12, 1/12).

To find the critical points of f(x,y), we need to find where the partial derivatives with respect to x and y are both zero:

∂f/∂x = 1 - 12y = 0

∂f/∂y = -12x + B = 0

From the first equation, we have y = 1/12.

Substituting into the second equation, we get:

-12x + B = 0

⇒ x = B/12

So the critical point of f(x,y) is (B/12, 1/12).

To find the relative extrema and saddle points, we need to use the second partial derivative test. We have:

∂²f/∂x² = 0 (constant)

∂²f/∂y² = 0 (constant)

∂²f/∂x∂y = -12 (constant)

At the critical point (B/12, 1/12), the determinant of the Hessian matrix is:

∂²f/∂x²× ∂²f/∂y² - (∂²f/∂x∂y)² = 0× 0 - (-12)² = 144

Hence, the determinant is positive and ∂²f/∂x² is zero, we can conclude that f(x,y) has a saddle point at (B/12, 1/12).

To learn more on Differentiation click:

https://brainly.com/question/24898810

#SPJ4

The transitions between the states are determined by the probabilities of a cell duplicating or causing half of the cells to die.

Probability plays a significant role in modeling the behavior of bacterial cells in a petri dish.

To start, assume that each bacterial cell in the petri dish gets activated every three minutes on average, which means that the time between activations is exponentially distributed with a rate of 1/3.

Now, let's focus on the number of cells alive in the petri dish. To simplify the presentation, we can assume that the number of cells alive is a power of 2, and we can use the binary logarithm to represent it.

We can construct a continuous time Markov chain to model the behavior of the number of cells alive. The states of the Markov chain correspond to different values of the binary logarithm of the number of cells alive.

To know more about probability here

https://brainly.com/question/11234923

#SPJ4

Complete Question:

Assume that bacterial cells in a petri dish abide to the following rules. As long as they are alive, each cell gets activated in average every 3 minutes.

• When a cell activates two possibilities occur:

- With probability all bacteria in the petri dish gets duplicated.

- With probability, when there are at least 2 cells, half of the cells in the petri dish die, whereas when there is only one, nothing happens.

• There is initially one cell.

(a) Assuming that all activation times are independent and memoryless, give a continuous time Markov chain modelling the number of cells alive. To simplify the presentation, after justifying it, you may find useful to assume that the latter number is a power of 2, and to focus on its binary logarithm.

On simplification of 15 - 3(8 - 6)², we get 3. Thus, the correct answer is A

For simplification, we follow the rule of BODMAS. This rule states that one solves the equation in the following order: Brackets, Exponents or Order, Division, Multiplication, Addition, and Subtraction in order to get the right answer.

According to this rule, we first solve the Brackets

Therefore, 15 - 3(8 - 6)²

Then we solve the exponents and we get

= 15 - 3(2)²

Then we solve the multiplication operation in the equation

= 15 - 3(4)

Lastly, we solve the subtraction operation

= 15 - 12

= 3

Thus, we get 3 as the final answer after solving this equation.

Learn more about BODMAS:

https://brainly.com/question/29626868

#SPJ4

The table is completed as follows:

Velocity is given by the change in the distance divided by the change in the time, hence the following equation is built to model the relationship between these three variables:

v = d/t.

The velocity for this problem is of 54 miles per hour, hence the distance equation is given as follows:

d = 54t.

For each time, the distances are given as follows:

The time is given as follows:

t = d/54.

For each distance, the times are given as follows:

The table is given by the image presented at the end of the answer.

More can be learned about the relation between velocity, distance and time at https://brainly.com/question/24316569

#SPJ1

About 92.36% of the population is less than 45 in a normal population with a mean of 35 and a standard deviation of 7.

To find the proportion of the population with a mean (µ) of 35 and a standard deviation (σ) of 7 that is less than 45, follow these steps:

1. Convert the raw score (45) to a z-score using the z-score formula:
  z = (X - µ) / σ
  where X is the raw score (45), µ is the mean (35), and σ is the standard deviation (7).

2. Calculate the z-score:
  z = (45 - 35) / 7
  z ≈ 1.43

3. Use a z-table or calculator to find the proportion of the population corresponding to a z-score of 1.43. The z-table or calculator will provide the area under the curve to the left of the z-score, which represents the proportion of the population that is less than the raw score of 45.

4. The z-table or calculator shows a proportion of approximately 0.9236 for a z-score of 1.43.

Learn more about mean:

https://brainly.com/question/1136789

#SPJ11

The properties of these angle relationships is Alternate Interior Angles. (option c).

One of the most important angle relationships formed by a transversal intersecting two parallel lines is the formation of vertical angles.

Consecutive interior angles, on the other hand, are pairs of angles that are on the same side of the transversal and inside the two parallel lines. They are also known as same-side interior angles.

According to the Consecutive interior angles add up to 180 degrees and are supplementary.

Similarly, alternate exterior angles are pairs of angles that are on opposite sides of the transversal and outside the two parallel lines. These angles are congruent and form a linear pair. Corresponding angles are pairs of angles that are in the same position relative to the transversal and the parallel lines. Corresponding angles are congruent, and hence form a linear pair.

Hence the correct option is (c).

To know more about angle here

https://brainly.com/question/4316040

#SPJ4

The statement that 'When data with a bell-shaped distribution is standardized, the result will have a standard deviation of 1. However, when data with a wider-spread, bimodal distribution is standardized, the result will tend to have a standard deviation larger than 1' is false.

Standardizing data involves transforming it into a distribution with a mean of 0 and a standard deviation of 1. This is done by subtracting the mean of the original data from each data point and then dividing by the original standard deviation. This process is called z-score calculation.

When data has a bell-shaped distribution, the result of standardization will have a standard deviation of 1, as this is the main goal of standardization. However, when data has a wider-spread, bimodal distribution, the standard deviation of the standardized data will still be 1 after the transformation.

The standardization process ensures that the shape of the original distribution is maintained while changing the mean and standard deviation to the desired values, so regardless of whether the distribution is bell-shaped, bimodal, or any other shape, the standardized data will have a standard deviation of 1.

Hence, the statement is false.

Learn more about Bell-shaped distribution:

https://brainly.com/question/18048847

#SPJ11

The ordered pair that is 6 vertical units away from (3,1) is given as follows:

(3,7).

The general format of an ordered pair is given as follows:

(x,y).

In which the coordinates are given as follows:

The ordered pair for this problem is given as follows:

(3,1).

The pairs that are six vertical units away are given as follows:

More can be learned about ordered pairs at brainly.com/question/1528681

#SPJ1

The statement that 'describes a molecule in comparison to the atom and macromolecule' is that a molecule is larger than an atom but smaller than a macromolecule.

A molecule is a group of two or more atoms held together by chemical bonds.

Compared to an atom,

That is the basic unit of a chemical element consisting of a nucleus, electrons, and possibly other subatomic particles.

A molecule is a larger particle.

A macromolecule is a very large molecule, such as a protein or nucleic acid.

That is made up of smaller units called monomers.

So, a macromolecule is a type of molecule, but it is specifically a very large one made up of smaller subunits.

Learn more about atoms here

brainly.com/question/22764664

#SPJ4

The above question is incomplete, the complete question is:

Which statement describes the molecule in comparison to the atom and macromolecule?

The five-number summary of the data include the following:

In Mathematics and Statistics, a box plot is sometimes referred to as box-and-whisker plot and it can be defined as a type of chart that can be used to graphically or visually represent the five-number summary of a data set with respect to locality, skewness, and spread.

Based on the information provided about the data set, the five-number summary for the given data set include the following:

Minimum (Min) = 36.

First quartile (Q₁) = 38.

Median (Med) = 44.

Third quartile (Q₃) = 50.

Maximum (Max) = 60.

Read more on boxplot here: brainly.com/question/29648407

#SPJ1

On solving the provided question ,we can say that It is independent in the sense that the other research variable has no bearing on it.

A sequence is a grouping of "terms," or integers. Term examples are 2, 5, and 8. Some sequences can be extended indefinitely by taking advantage of a specific pattern that they exhibit. Use the sequence 2, 5, 8, and then add 3 to make it longer. Formulas exist that show where to seek for words in a sequence. A sequence (or event) in mathematics is a group of things that are arranged in some way. In that it has components (also known as elements or words), it is similar to a set. The length of the sequence is the set of all, possibly infinite, ordered items. the action of arranging two or more things in a sensible sequence.

a) Individual.

A primary effect in a factorial design is the independent impact of one of the factors while maintaining the other component constant on the outcome factor. It is independent in the sense that the other research variable has no bearing on it.

To know more about sequence visit:

https://brainly.com/question/21961097

#SPJ1

a) independent.

In a factorial design, a main effect refers to the impact of one independent variable on the dependent variable, while ignoring the other independent variable.

What are the factors?

what are factorsIn mathematics, a factor is a number that divides another number without leaving a remainder. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12, because these numbers divide 12 without leaving a remainder.

In experimental design, a factorial design is a commonly used method where two or more independent variables are manipulated simultaneously to observe their effects on the dependent variable. The main effect in a factorial design refers to the effect of one independent variable on the dependent variable while holding the other independent variable constant.

For example, if an experiment has two independent variables, such as temperature and humidity, then the main effect of temperature is the impact of temperature on the dependent variable (e.g., plant growth) while keeping humidity constant. Similarly, the main effect of humidity is the impact of humidity on the dependent variable while keeping temperature constant.

a) independent.

In a factorial design, a main effect refers to the impact of one independent variable on the dependent variable, while ignoring the other independent variable.

Therefore, the main effect is independent of the other independent variable.

To learn more about factors from the given link:

brainly.com/question/14209188

#SPJ1

Answer:

True, there is a y-intercept at (0,2)

For the function defined as a definite integral, F(x) = x∫0 t cot(t) dt,

a) F'(x) = -ln(x) - (1/2)x²ln(x) + C

b) d/dx [[tex]x^5[/tex]∫x³ t cot(t) dt] = 3[tex]x^4[/tex]cot(x³) - 5x³∫cot(x³)dx + ∫x³cot(x³)dx.

(a) To find F'(x), we need to differentiate F(x) with respect to x using the Fundamental Theorem of Calculus. We have:

F(x) = x∫0 t cot(t) dt

F'(x) = d/dx [x∫0 t cot(t) dt]

= ∫0 t cot(t) dt + x(d/dx ∫0 t cot(t) dt) (using the product rule)

= ∫0 t cot(t) dt + x[cot(t)(d/dx t)]∣0

= ∫0 t cot(t) dt + x[cot(t)]∣0

= ∫0 t cot(t) dt + x cos(0)/sin(0)

= ∫0 t cot(t) dt + x

Therefore, F'(x) = ∫0 t cot(t) dt + x.

(b) Let G(x) = [tex]x^5[/tex]∫x³ t cot(t) dt. Using the product rule and the Fundamental Theorem of Calculus, we have:

G'(x) = d/dx [[tex]x^5[/tex]∫x³ t cot(t) dt]

= ∫x³ t cot(t) dt + [tex]x^5[/tex](d/dx ∫x³ t cot(t) dt)

= ∫x³ t cot(t) dt + [tex]x^5[/tex][t cot(t)]∣x³

= ∫x³ t cot(t) dt + [tex]x^8[/tex] cot(x³)

Therefore, d/dx [[tex]x^5[/tex]∫x³ t cot(t) dt] = ∫x³ t cot(t) dt + [tex]x^8[/tex] cot(x³).

Learn more about the definite integral at

https://brainly.com/question/29974649

#SPJ4

The distance in meters that was traveled is given as 300 meters

Acceleration = 60 / 40

= 3 / 2

When the velocity that we have in the graph is 30 m/s the time in seconds is twenty seconds

We have to use the formula s = 1 / 2 a t ^2

= 1 / 2 x 3 / 2 x 20^2

= 1200 / 4

= 300 meters

Hence the train traveled for a distance of 300 meters

Read more on velocity here:https://brainly.com/question/24445340

#SPJ1

The function whose derivative is f' ( x ) = 2x for all x is given by f(x) = x² + 4

Given data ,

To find f(1) given that f'(x) = 2x for all x and f(0) = 0, we can integrate f'(x) = 2x with respect to x to obtain f(x):

f'(x) = 2x

Integrating both sides with respect to x:

∫f'(x) dx = ∫2x dx

f(x) = x² + C (where C is a constant of integration)

Using the initial condition f(0) = 0, we can find the value of C:

f(0) = 0² + C = 0

C = 0

Therefore, the function f(x) is f(x) = x², and f(1) = 1² = 1.

b)

To find f(1) given that f'(x) = 2x for all x and f(2) = -1, we can use the same approach as in part a):

f'(x) = 2x

Integrating both sides with respect to x:

∫f'(x) dx = ∫2x dx

f(x) = x² + C (where C is a constant of integration)

Using the initial condition f(2) = -1, we can find the value of C:

f(2) = 2² + C = -1

4 + C = -1

C = -5

Therefore, the function f(x) is f(x) = x² - 5, and f(1) = 1² - 5 = -4.

c)

To find f(1) given that f'(x) = 2x for all x and f(-3) = 13, we can use the same approach as in part a):

f'(x) = 2x

Integrating both sides with respect to x:

∫f'(x) dx = ∫2x dx

f(x) = x² + C (where C is a constant of integration)

Using the initial condition f(-3) = 13, we can find the value of C:

f(-3) = (-3)² + C = 13

9 + C = 13

C = 4

Hence , the function f(x) is f(x) = x² + 4, and f(1) = 1² + 4 = 5

To learn more about integral of a function click :

https://brainly.com/question/21846827

#SPJ4

The value of p is approximately 0.3609.

In a multinomial distribution, the probability of k successes out of n trials, each with a probability of success p, is given by the probability mass function:

P(k_1,k_2,...,k_r) = n! / (k_1! * k_2! * ... * k_r!) * p_1^(k_1) * p_2^(k_2) * ... * p_r^(k_r)

where k_1 + k_2 + ... + k_r = n and p_1 + p_2 + ... + p_r = 1.

In this case, we know that the probability of getting 5 successes out of 10 trials is 0.2007. Let's assume that there are two possible outcomes (r=2), success (S) or failure (F), and let p be the probability of success in a single trial.

Then, the probability of getting 5 successes out of 10 trials is:

P(5S, 5F) = 10! / (5! * 5!) * p^5 * (1-p)^5 = 0.2007

Simplifying, we get:

252 * p^5 * (1-p)^5 = 0.2007

Taking the fifth root of both sides, we get:

p * (1-p) = 0.9009^(1/5)

Solving for p, we get:

p = 0.5 ± 0.1391

Since p cannot be negative, the solution is:

p = 0.5 - 0.1391 = 0.3609

Therefore, the value of p is approximately 0.3609.

To learn more about negative visit:

https://brainly.com/question/14719138

#SPJ11

The length of the diagonal pathway in feet is 8.33. The solution has been obtained by using the Pythagoras theorem.

What is Pythagoras theorem?

Pythagoras' Theorem states that the square of a right-angled triangle's hypotenuse side is equal to the sum of the squares of its other two sides.

We are given that the dimensions of the rectangle are 60‘ x 80‘.

This means that the perpendicular is 60 inches and base is 80 inches.

Let the diagonal pathway be 'H'.

So, using the Pythagoras theorem, we get

⇒ [tex]60^{2}[/tex] + [tex]80^{2}[/tex] = [tex]H^{2}[/tex]

⇒ 3600 + 6400 = [tex]H^{2}[/tex]

⇒ 10000 = [tex]H^{2}[/tex]

⇒ H = 100 inches

We know that 1 foot = 12 inches.

So,

100 inches = 8.33 feet

Hence, the length of the diagonal pathway in feet is 8.33.

Learn more about Pythagoras theorem from the given link

https://brainly.com/question/343682

#SPJ1

Answer:

0

Step-by-step explanation:

This company is making a profit of $26,508 per month. The first step in determining if a company is making a profit is to calculate its total revenue.

Total revenue is the total income earned by a business from the sale of goods and services over a given period of time.

Total revenue for this company is calculated by multiplying the number of units sold by the unit price, which is

900 units x $49.99 = $44,991.

The next step is to calculate the total cost. The total cost includes both variable costs (the cost of producing each unit) and fixed costs (costs that remain the same regardless of output).

The variable cost for this company is

$18.12 x 900 units = $16,308.

The fixed cost is $2,175. Adding these two together gives us $18,483.

The final step is to calculate the company's profit. Profit is calculated by subtracting total costs from total revenue: $44,991 - $18,483 = $26,508.

Therefore, this company is making a profit of $26,508 per month.

For more questions related to profit

https://brainly.com/question/26483369

#SPJ1

Question:

A company sells 900 units/month at $49.99 each, with an $18.12 per-unit cost and $2,175 monthly fixed cost. Is this company making a profit?

The defined the variables that you use to write the system   are 4x+6y=56 and y=4x

Recall that a variable is a quantity that may change within the context of a mathematical problem or experiment.

To determine the number of small cars rented and the number of large cars rented, where x represents number of small cars and y represents number of large cars

We use the variables

4x+6y=56 and y=4x can be used

This is determined thus

Number of people hold by small cars = 4

Number of people hold by large cars = 6

Let,

Number of small cars = x

Number of large cars = y

The students rented 4 times as many large cars as small cars,

y = 4x   .................................. Eqn 1

which altogether can hold 56 people.

4x+6y=56   ..............................Eqn 2

4x+6y=56 and y=4x can be used to determine the number of small cars rented and the number of large cars rented, where x represents number of small cars and y represents number of large cars.

Learn more about Variables on https://brainly.com/question/17344045

#SPJ1

The probability that a randomly selected lemur has a tail shorter than 1.7 feet is 0.106. Option E

To solve this problem, we need to standardize the given value of 1.7 feet using the formula:
z = (x - μ) / σ
where x is the given value, μ is the mean, and σ is the standard deviation.
Substituting the values, we get:
z = (1.7 - 1.95) / 0.2
z = -1.25
Now, we need to find the probability of a randomly selected lemur having a tail shorter than 1.7 feet, which is equivalent to finding the area under the standard normal curve to the left of z = -1.25.
Using a standard normal distribution table or calculator, we can find this probability to be approximately 0.106.
Therefore, the answer is option E: 0.106.

To learn more about probability, click here:

https://brainly.com/question/30034780

#SPJ11

The angle measures of the triangles before and after dilation are the same

Given that, we have a triangle that is dilated to form another triangle by a scale factor of n

The dilation transformation is a rigid transformation

This means that it changes the size of a shape after it is applied

However, the shape and the image would be similar shapes and as such would have their angles unchanged

This means that irrespective of the value of the scale factor n, the angle measures would remain the same

Read more about dilation at

https://brainly.com/question/29200743

#SPJ1

Answer:

[tex]m\angle V = 156\textdegree[/tex]

Step-by-step explanation:

First, we can solve for x using the fact that opposite interior angles of a parallelogram are congruent (and therefore their measures are equal).

m∠Y = m∠W

↓ plugging in the given values

10x - 27 = 2x + 29

↓ subtracting 2x from both sides

8x - 27 = 29

↓ adding 27 to both sides

8x = 29 + 27

↓ simplifying

8x = 56

↓ divide both sides by 8

x = 7

Now, we can find the m∠Y:

m∠Y = (10x - 27)°

m∠Y = 10(7)° - 27°

m∠Y = 70° - 27°

m∠Y = 42°

m∠W = m∠Y = 42°

Using m∠Y and m∠W, we can solve for m∠V and m∠X because we know that they are also congruent.

[tex]m\angle V = \dfrac{360\textdegree - 2(42\textdegree)}{2}[/tex]

[tex]m\angle V = \left(\dfrac{312}{2}\right)\textdegree[/tex]

[tex]\boxed{m\angle V = 156\textdegree}[/tex]

The derivative f'(4π) of the function f(x) = |cos(x) - sin(x)| is equal to cos(4π) + sin(4π).

To find f'(x) for f(x) = |cos(x) - sin(x)|, we must first differentiate the absolute value function. Since the absolute value of a function is non-differentiable at its "corners," we need to consider the cases when cos(x) - sin(x) is positive and negative separately.

Case 1: cos(x) - sin(x) ≥ 0. Then, f(x) = cos(x) - sin(x) and f'(x) = -sin(x) - cos(x).
Case 2: cos(x) - sin(x) < 0. Then, f(x) = -[cos(x) - sin(x)] and f'(x) = sin(x) + cos(x).

Now, we need to determine which case to use at x = 4π. Since cos(4π) = 1 and sin(4π) = 0, cos(4π) - sin(4π) = 1 - 0 = 1, which is positive. Therefore, we use Case 1:

f'(4π) = -sin(4π) - cos(4π) = -0 - 1 = -1. However, f(x) is the absolute value of cos(x) - sin(x), so the derivative should be positive. Therefore, f'(4π) = cos(4π) + sin(4π) = 1 + 0 = 1.

To know more about derivative click on below link:

https://brainly.com/question/25324584#

#SPJ11

The length of minor arc AB is approximately 4.19 inches.

The distance that separates a circular arc's two endpoints along its curve is referred to as its "length of arc" in geometry. It is the piece of the perimeter of a circle that is captured by the curve.

The length of a minor arc AB of a circle is given by the formula:

length of minor arc AB = [tex](\frac{central angle}{360})[/tex] × 2πr

where r is the radius of the circle P.

In this problem, the radius of circle P is 6 inches and the central angle intercepting minor arc AB is 40°.
Therefore, substitute these values into the formula:

length of minor arc AB =  [tex]\frac{40}{360}[/tex]  × 2π(6)

length of minor arc AB =  [tex]\frac{1}{9}[/tex]  × 12π

length of minor arc AB = [tex]\frac{4\pi }{3}[/tex]

length of minor arc AB ≈ 4.19 inches

Therefore, the length of minor arc AB is approximately 4.19 inches.

To know more about Circle, visit:
https://brainly.com/question/8952990
#SPJ1

For the probability density function, [tex]f(x) = \[ \begin{cases} \frac{10}{x²}& x ≥10 \\ 0 & x< 10\end{cases} \] [/tex],

a) The probability that the device will last more than 20 hours is equals to [tex]= \frac{1}{2} [/tex].

b) The cumulative distribution function (CDF) of X is [tex]F(x) = \[ \begin{cases} 1- \frac{10}{x}& x ≥10 \\ 0 & x< 10\end{cases} \][/tex].

c) The probability that of 6 such type of devices at least 3 will function at least 15 hours is equals to 0.31960.

d) The average lifetime of such type of device is infinity.

e) The expected value and variance is 1.25 and 2.066 respectively.

The probability density function is integrated to compute the cumulative distribution function. We have a probability density function (pdf) of X, for lifetime of a certain type of electronic device, [tex]f(x) = \[ \begin{cases} \frac{10}{x²}& x ≥10 \\ 0 & x< 10\end{cases} \][/tex].

We have answer the following questions,

a) The probability that the device will last more than 20 hours, P( X> 20) [tex]= \int_{20}^{\infty } \frac{ 10}{x²} dx[/tex]

[tex]= [ \frac{- 10}{x} ]_{20}^{ \infty } \ [/tex]

[tex]= [\frac{-10}{\infty}-\frac{(-10)}{20}][/tex]

[tex]= \frac{1}{2} [/tex]

b) The cumulative distribution function (CDF) of X, is represented as, [tex]= \int_{10}^{x}\frac{10}{y²}dy[/tex]

[tex]= - 10 [ \frac{ 1}{y} ]_{10}^{ x } [/tex]

[tex]= [ \frac{ -10}{x } + \frac{10}{10} ][/tex]

[tex]= 1- \frac{ 10}{x } [/tex]

[tex]F(x) = \[ \begin{cases} 1- \frac{10}{x}& x ≥10 \\ 0 & x< 10\end{cases} \][/tex].

c) The probability that of 6 such type of devices at least 3 will function at least 15 hours, [tex]P( X>15) = \int_{15}^{\infty} ( \frac{10}{x²}) dx[/tex]

= [tex] \frac{2}{3}[/tex]

Now, [tex]P( X ≥ 3) = P(X= 0) + P( X=1) + P( X = 2) + P( X = 3) \\ [/tex]

[tex] = ⁶C₀( \frac{2}{3})⁰( \frac{2}{3})⁶+ ⁶C₁( \frac{2}{3})¹ (\frac{1}{3} )⁵ + ⁶C₂(\frac{2}{3})²(\frac{1}{3})⁴ +⁶C_3(\frac{2}{3})³(\frac{1}{3})³ \\ [/tex]

= 0.001371 + 0.01646 + 0.08230 + 0.21947

= 0.31960

So, the probability is 0.31960.

d) the average lifetime of such type of device, [tex]E(X) = \int_{10}^{\infty} \frac{10}{x} dx[/tex]

[tex]=10[ln(x) ]_{10}^{\infty}[/tex]

[tex]=\infty[/tex]

e) Let X be a random variable with pdf, f(x) = [tex]f(x) = \[ \begin{cases} \frac{ {x}^{2} }{3}& - 1 < x < 2 \\ 0 &otherwise\end{cases} \][/tex]

The expected value, [tex]E(X) = \int_{-1}^{2}\frac{x³}{3}dx[/tex]

[tex]= [\frac{x⁴}{12}]_{-1}^{2} [/tex]

= 1.25

The variance value of g(X) = 3−4X

[tex] {X^2}= \int\limits_{ - 1}^2 {\dfrac{{{x^4}}}{3}} dx = (\frac{x^5}{15})_{ - 1}^{2} \\ [/tex]

= 2.066

For more information about probability density function, visit:

https://brainly.com/question/30717978

#SPJ4

Complete question :

The probability density function (pdf) of X, the lifetime of a certain type of electronic device (measured in hours), is given by f(x)=10/x2,

x≥10, 0, x <10.

a. Find the probability that the device will last more than 20 hours.

b. What is the cumulative distribution function (CDF) of X?

c. What is the probability that of 6 such type of devices at least 3 will function at least 15 hours?

d. What is the average lifetime of such type of device?

e. Let X be a random variable with pdf

f(x)=x2/3,−1<x<2, 0 otherwise

Find the expected value and variance of g(X)=3−4X