Please tell me how you get the answer!

swimming at a rate of 40 yards per minute for 30 minutes will burn 150 calories. How many minutes must a person swim at this rate to burn 900 calories?


Answer: 180

promotional strategies used by companies to draw clients and boost sales. For example, product promotions include free samples, whereas sales promotions include coupons and competitions.

Sales promotions are short-term incentives provided by businesses to entice clients to make a purchase or carry out a specific action, such redeeming a coupon or participating in a competition. On the other hand, product promotions use free samples to spread the word about and encourage people to try a new or existing product.

The coupons, contests, and free samples that Conley is looking for while preparing to go shopping after the Christmas holidays are all examples of promotional tools or marketing strategies used by companies to attract customers and boost sales. Samples are a particularly effective marketing tool as they allow customers to try products before purchasing them, increasing the likelihood of a sale. Conley's proactive approach to finding these promotional tools and taking advantage of them demonstrates her savvy consumer skills.

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The limit of the expression (x³-2x²+3x-4)/(4x³-3x²+2x-1) as x approaches infinity is 1/4.

What are rational exponents?

Rational exponents are exponents that are expressed as fractions. Specifically, a rational exponent of the form m/n is equivalent to taking the nth root of a number and then raising it to the power of m.

To determine the limit of the expression (x³-2x²+3x-4)/(4x³-3x²+2x-1) as x approaches infinity, we need to look at the behavior of the numerator and the denominator as x gets larger and larger.

As x approaches infinity, the dominant term in the numerator is x³, and the dominant term in the denominator is 4x³.

Therefore, we can simplify the expression by dividing both the numerator and denominator by x³:

(x³-2x²+3x-4)/(4x³-3x²+2x-1) = [(x³/x³) - (2x²/x³) + (3x/x³) - (4/x³)] / [(4x³/x³) - (3x²/x³) + (2x/x³) - (1/x³)]

Simplifying further, we get:

= [1 - (2/x) + (3/x²) - (4/x³)] / [4 - (3/x) + (2/x²) - (1/x³)]

As x approaches infinity, all the terms with a 1/x³ or higher power in the denominator go to zero, and all the terms with a 1/x² or higher power in the numerator go to zero. This leaves us with:

= 1/4

Therefore, the limit of the expression (x³-2x²+3x-4)/(4x³-3x²+2x-1) as x approaches infinity is 1/4.

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The value of y in the right triangle is 27.3 cm.

A right angle triangle is a triangle that has one of its angle as 90 degrees.

The sum of angles in a triangle is 180 degrees.

Therefore, let's apply Pythagoras's theorem to find the sides of the right triangle as follows:

c² = a² + b²

where

Therefore,

20.2² - 16.4² = h²

408.04 - 268.96 = h²

h = √677

h = 26.0192236625

h = 26.0 cm

Let's find y as follows:

y² = 26² + 8.2²

y = √676 + 67.24

y = √743.24

y = 27.2624283585

y = 27.3 cm

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The equation given by Jill and Joel both are correct. Option C .

The line passing through the points (2, -1) and (-1, 14).

The equation of a line passing through a point [tex](x_1, y_1)[/tex] is [tex]y-y_1=m (x-x_1)[/tex] where m is the slope.

To find the slope m, using slope formula.

[tex]m=\frac{y_2-y_1}{x_2-x_1} \\m=\frac{14-(-1)}{-1-3} \\m=-5[/tex]

Further simplify,

Substitute the values in the given formula.

[tex]y-y_1=m(x-x_1)\\y-(-1)=-5(x-2)\\y+1=-5(x-2)[/tex]

Further simplify,

5x+y=9

Both the equations are correct.

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The sample standard deviation for the sample size of 400 is equal to 4 (with no decimals).

Sample size = 400

Standard error of the mean = 0. 2

The sample standard deviation, additional information beyond the mean anxiety score and the standard error of the mean.

Specifically, the size of the random sample, the degrees of freedom, and either the confidence level or the critical t-value.

Assuming that the sample size is large enough  n > 30 and the population standard deviation is unknown,

Use the following formula to estimate the standard deviation of the population from the standard error of the mean,

s = SEM × √(n)

where s is the sample standard deviation,

SEM is the standard error of the mean,

and n is the sample size.

Substituting the given values, we get,

s = 0.2 × √(400)

  = 0.2 × 20

  = 4

Therefore, the sample standard deviation is 4 (with no decimals).

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There are 31 ways to select two books from different subjects among the five distinct computer science books, three distinct mathematics books, and two distinct art books.

To solve this problem, we can use the formula for combinations:

nCr = n! / r!(n-r)!

where n is the total number of items, r is the number of items we want to select, and ! denotes factorial (e.g. 5! = 5 x 4 x 3 x 2 x 1).

In this case, we want to select two books from different subjects, so we need to consider the different subject categories separately. We can select one book from computer science, one book from mathematics, or one book from computer science and one book from art, or one book from mathematics and one book from art.

For selecting one book from computer science, we have 5 choices. For selecting one book from mathematics, we have 3 choices. And for selecting one book from art, we have 2 choices.

So the total number of ways to select two books from different subjects is:

(5C1 x 3C1) + (5C1 x 2C1) + (3C1 x 2C1)
= (5 x 3) + (5 x 2) + (3 x 2)
= 15 + 10 + 6
= 31

Therefore, there are 31 ways to select two books from different subjects among the five distinct computer science books, three distinct mathematics books, and two distinct art books.

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Answer:

63 miles/1.4 hours = 45 mph

(55 mph)(4 hours) = 220 miles

Double ids refers to a system where there are two separate intrusion detection systems, in this case, system a and system b. The given probabilities indicate the likelihood of each system sounding an alarm in the presence or absence of an intruder.

a. Let P(Ai) and P(Bi) represent the probabilities of system a and system b sounding an alarm in the presence of an intruder, respectively. Let P and P(Bf) represent the probabilities of system a and system b sounding an alarm in the absence of an intruder, respectively. Therefore, P(Ai) = 0.9, P(Bi) = 0.95, P = 0.2, and P(Bf) = 0.1.

b. To find the probability that both systems sound an alarm in the presence of an intruder, we multiply the probabilities of system a and system b sounding an alarm: P(Ai and Bi) = P(Ai) x P(Bi) = 0.9 x 0.95 = 0.855.

c. To find the probability that both systems sound an alarm in the absence of an intruder, we multiply the probabilities of system a and system b sounding an alarm when there is no intruder: P(and Bf) = P x P(Bf) = 0.2 x 0.1 = 0.02.

d. Given that there is an intruder, the probability of both systems sounding an alarm is already calculated in part b as 0.855.

In conclusion, the probabilities of the double IDS (Intrusion Detection System) are represented by P(Ai), P(Bi), P, and P(Bf). The probability that both systems sound an alarm in the presence of an intruder is 0.855, while the probability that both systems sound an alarm in the absence of an intruder is 0.02. Therefore, the given information allows us to calculate the probabilities of the double IDS accurately in different scenarios.

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Answer:

A, D

Step-by-step explanation:

A letter or a symbol that stands for a number is a variable.

In choice A, ? stands for a number.

In choice D, x stands for a number.

Choices B and C only have numbers, so there are no variables there.

Answer: A, D

Therefore, to reduce the expression to lowest terms, we can simplify by canceling out the common factor of (x + 1) in both the numerator and denominator: (3(x + 1))/(x + 1)(x - 1) = 3/(x - 1) and the excluded values for this simplified expression are x = 1 and x = -1.

Based on the information given, it seems that Adi made the mistake of excluding x = 1, which doesn't make the denominator in the new expression equal to zero.

When factoring the denominator, Adi correctly identified that x^2 - 1 can be written as (x + 1)(x - 1). Therefore, the original expression can be rewritten as:

=(3(x + 1))/(x + 1)(x - 1)

However, Adi then excluded x = 1 as an excluded value, implying that x + 1 = 0 in the denominator. But this is not correct, because x + 1 does not equal zero when x = 1.

In fact, the excluded values for this expression are x = 1 and x = -1, because they would make the denominator equal to zero.

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Scientists are studying a sample of radioactive material. The amount left, in grams, after t days can be modeled by the function N(t) = a(b)ᵗ, where a and b are constants. The expression for [tex]N(t) =[/tex] [tex]\underline{65(0.9)^t}[/tex]

From the table:

N(t) = 58.5, when t = 1,

N(t) = 52.65, when t = 2

Setting up the equations,

[tex]58.5 = a(b)^1[/tex] --------(1)

[tex]52.65 = a(b)^2[/tex] --------(2)

Dividing (2) by (1), we get:

[tex]\frac{52.65}{58.5} = \frac{a(b)^2}{a(b)^1}[/tex]

⇒ 0.9 = b

Substituting b = 0.9 in eq (1),

[tex]58.5 = a(0.9)^1[/tex]

[tex]58.5 = a(0.9)[/tex]

[tex]a = \frac{58.5}{0.9}[/tex]

⇒ a ≈ 65

Therefore, the expression for N(t) is [tex]N(t) = 65(0.9)^t[/tex].

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The positive difference between 4 and 9 is 9 - 4 = 5.

To find the maximum quotient between the digits 4 and 9, we divide the larger digit (9) by the smaller digit (4). The quotient is 9 ÷ 4 = 2.25.

Now, to find the product of the positive difference and the maximum quotient, we multiply 5 by 2.25:

[tex]5*2.25 = 11.25[/tex]

This means that 11.25 is the result of multiplying the extent of the numerical difference between 4 and 9 by the maximum possible ratio between the two digits.

Therefore, the product of the positive difference and the maximum quotient between the digits 4 and 9 is 11.25.

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Answer:

The answer is SI of $1980

Answer:

No

Step-by-step explanation:

Answer: no

Step-by-step explanation:

Typically you can test if lines are perpendicular. You would test if the slopes are opposite signed and reciprocals(flipped)

You don't need to test, you can see the lines do not look perpendicular

They would form right angles, or squared angles, like the corner of a paper.

so answer is no

If we plug in n = 1, 2, 3, ..., we get the terms of the sequence as follows:

a(1) = 5(1) + 15 = 20

a(2) = 5(2) + 15 = 25

a(3) = 5(3) + 15 = 30

a(4) = 5(4) + 15 = 35

and so on.

Binomial refers to a type of probability distribution that describes the number of successes in a fixed number of independent trials, where each trial has only two possible outcomes (success or failure) and the probability of success is constant across all trials.

a) The given sequence increases by 5 with each term. Therefore, the formula to generate this sequence is:

a(n) = 5n + 1,

where n ≥ 1

So, if we plug in n = 1, 2, 3, ..., we get the terms of the sequence as follows:

a(1) = 5(1) + 1 = 6a(2) = 5(2) + 1 = 11

a(3) = 5(3) + 1 = 16

a(4) = 5(4) + 1 = 21

a(5) = 5(5) + 1 = 26

and so on.

b) The given sequence increases by 5 with each term.

Therefore, the formula to generate this sequence is:

a(n) = 5n + 15,

where n ≥ 1

So, if we plug in n = 1, 2, 3, ..., we get the terms of the sequence as follows:

a(1) = 5(1) + 15 = 20

a(2) = 5(2) + 15 = 25

a(3) = 5(3) + 15 = 30

a(4) = 5(4) + 15 = 35

and so on.

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To solve the exponential and logarithmic functions in the unit, you need to apply the power rule. The missing angles are as follows:

1.  45°

2.  129°

3. 37°

To get the answers to the exponential and logarithmic functions, first, identify the exponential expression, then you should take the logs of the two sides you want to evaluate. Finally, use the power rule of logarithms to get the answers.

The power rule will be used correctly when you express the log as the product of the base log and exponent. When this is done, it will be easy to simplify the functions.

We can find the missing angles as follows:

1. m∠1 = 180° - (76° + 59°)  

= 45°

Therefore, m∠1 = 45°

2. m∠1 = 62° + 67°

= 129°

Therefore, m∠1 = 129°

3. m∠1 = 152° - 115°

= 37°

Therefore, m∠1  = 37°

Question:

Unit 4: Congruent Triangles

Find all missing angles

1. m∠1

2. m∠1

3. m∠1

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The solutions to the quadratic equation 3x² - 8x - 8 = 0 are -0.77 and 3.44.

Given the quadratic equation in the question:

3x² - 8x - 8 = 0

To solve the quadratic equation 3x² - 8x - 8 = 0 by using the quadratic formula:

x = (-b ± √(b² - 4ac)) / 2a

Where a, b, and c are the coefficients of the quadratic equation.

Here, a = 3, b = -8, and c = -8.

Substituting these values into the quadratic formula, we get:

x = (-b ± √(b² - 4ac)) / 2a

x = (-(-8) ± √((-8)² - 4(3)(-8))) / 2(3)

x = ( 8± √( 64 + 96)) / 6

x = ( 8± √( 64 + 96)) / 6

x = (8 ± √(160)) / 6

x = (8 ± 4√(10)) / 6

Simplifying further by dividing both numerator and denominator by 2:

x = (4 ± 2√(10)) / 3

x = (4 - 2√(10)) / 3 and x = (4 + 2√(10)) / 3

x = -0.77 and x = 3.44

Therefore, the solutions are  -0.77 and x = 3.44

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Answer:

The break-even point is the point at which total cost and total revenue are equal, meaning there is no loss or gain for your small business.

Step-by-step explanation:

Answer:

Its Pretty Simple

Step-by-step explanation:

What Is a Break-Even Price?

A break-even price is the amount of money, or change in value, for which an asset must be sold to cover the costs of acquiring and owning it. It can also refer to the amount of money for which a product or service must be sold to cover the costs of manufacturing or providing it.

In options trading, the break-even price is the price in the underlying asset at which investors can choose to exercise or dispose of the contract without incurring a loss.

KEY TAKEAWAYS

A break-even price describes a change of value that corresponds to just covering one's initial investment or cost.

For an options contract, the break-even price is that level in an underlying security when it covers an option's premium.

In manufacturing, the break-even price is the price at which the cost to manufacture a product is equal to its sale price.

Break-even pricing is often used as a competitive strategy to gain market share, but a break-even price strategy can lead to the perception that a product is of low quality.

Break-Even Price Formula

The break-even price is mathematically the amount of monetary receipts that equal the amount of monetary contributions. With sales matching costs, the related transaction is said to be break-even, sustaining no losses and earning no profits in the process. To formulate the break-even price, a person simply uses the amount of the total cost of a business or financial activity as the target price to sell a product, service, or asset, or trade a financial instrument with the goal to break even.

For example, the break-even price for selling a product would be the sum of the unit's fixed cost and variable cost incurred to make the product. Thus if it costs $20 total to produce a good, if it sells for $20 exactly, it is the break-even price. Another way to compute the total breakeven for a firm is to take the gross profit margin divided by total fixed costs:

Business break-even = gross profit margin / fixed costs

​​For an options contract, such as a call or a put, the break-even price is that level in the underlying security that fully covers the option's premium (or cost). Also known as the break-even point (BEP), it can be represented by the following formulas for a call or put, respectively:

BEP call = strike price + premium paid

BEPpu = strike price - premium paid

Break-Even Price Strategy

Break-even price as a business strategy is most common in new commercial ventures, especially if a product or service is not highly differentiated from those of competitors. By offering a relatively low break-even price without any margin markup, a business may have a better chance to gather more market share, even though this is achieved at the expense of making no profits at the time.

Being a cost leader and selling at the break-even price requires a business to have the financial resources to sustain periods of zero earnings. However, after establishing market dominance, a business may begin to raise prices when weak competitors can no longer undermine its higher-pricing efforts.

The following formula can be used to estimate a firm's break-even point:

Fixed costs / (price - variable costs) = break-even point in units

The break-even point is equal to the total fixed costs divided by the difference between the unit price and variable costs.

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The probability of randomly picking an orange from Jeff's box of fruit is 0.25 or 25%.

To determine the probability of picking an orange from Jeff's box of fruit, we need to first understand the concept of probability. Probability is the measure of the likelihood of an event occurring. It is expressed as a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain.

In this case, we know that Jeff has a box of fruit, and we are interested in the probability of picking an orange. To calculate this probability, we need to know the total number of fruits in the box and the number of oranges.

Assuming that Jeff's box contains a variety of fruits, we can estimate the total number of fruits in the box. Let's say there are 20 fruits in total. Now, we need to determine the number of oranges in the box. Let's say there are 5 oranges in the box.

To calculate the probability of picking an orange, we can use the following formula:

Probability of picking an orange = Number of oranges / Total number of fruits

Plugging in our numbers, we get:

Probability of picking an orange = 5 / 20

Simplifying, we get:

Probability of picking an orange = 0.25

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A) H0: μ = 8mg, Ha: μ ≠ 8mg.

B) [tex]t = (x̄ - μ) / (s / sqrt(n)) = (10.3 - 8) / (2 / sqrt(25)) = 5.5[/tex].

C) Degrees of freedom = n - 1 = 24, two-tailed t-test, α = 0.01, critical values are  ±2.492. p-value < 0.01.

D) We reject the null hypothesis and conclude that there is strong evidence that the mean amount of active ingredient in all dosages produced is different from 8 mg. The sample mean is significantly higher than 8 mg, indicating that the production process needs improvement.

(A) The null hypothesis is that the population mean of the active ingredient is equal to 8 mg, while the alternative hypothesis is that it is different from 8 mg. In symbols, H0: μ = 8 vs. Ha: μ ≠ 8.

(B) We apply the t-test formula to determine the value for the test statistic:

[tex]t = (xbar - μ) / (s / sqrt(n))[/tex]

where Î14 is the estimated population mean, n is the number of samples size, x bar represents the sample mean, and s is the standard deviation of the sample. Plugging in the values from the problem, we get:

[tex]t = (10.3 - 8) / (2 / sqrt(25)) = 3.25[/tex]

(C) To determine the critical value or the p-value, we look up the t-distribution with 24 degrees of freedom ( df = n - 1) and a two-tailed significance level of 0.01. The critical values are  ±2.492, while the p-value is less than 0.01.

(D) Based on the results, we reject the null hypothesis and conclude that the mean amount of active ingredient in all dosages produced is different from 8 mg at the 1% significance level. In practical terms, this means that the drug production process needs to be investigated and improved to ensure that the correct amount of active ingredient is consistently delivered in each dosage.

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The average student headcount for the spring terms is: 10700

A graph is a non-linear kind of data structure made up of nodes or vertices and edges. The edges connect any two nodes in the graph, and the nodes are also known as vertices. This graph has a set of vertices V= { 1,2,3,4,5} and a set of edges E= { (1,2),(1,3),(2,3),(2,4),(2,5),(3,5),(4,50 }.

We have the information:

From the graph,

Number of headcounts for spring '0.2 - 0.3' = 10900

Number of headcounts for spring '0.3 - 0.4' = 10500

Number of headcounts for spring '0.4 - 0.5' = 10700

The average student headcount for the spring terms is:

= 1/3 (10900 + 10500 + 10700)

= 10700

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For complete question, to see the attachment.

(a) The number of possible committees that can be formed is given by the combination formula: 5,311,735.

(b) 676,695 committees can be formed with exactly 4 men and 4 women.

(c) The probability that the committee is formed with at least 2 women is approximately 0.997.

What is combination?

In mathematics, a combination is a way of selecting items from a collection, such that the order of the selected items does not matter. In other words, it is a selection of items without regard to the order in which they are chosen.

(a) The number of possible committees that can be formed is given by the combination formula:

[tex]\binom{27}{8} &= \frac{27!}{8!19!} \ = 5,311,735.[/tex]

(b) The number of committees that can be formed with exactly 4 men and 4 women is the product of the number of ways to choose 4 men from 12 and the number of ways to choose 4 women from 15:

[tex]\binom{12}{4} . \binom{15}{4} &= 495.1365=676,695[/tex]

(c) The probability that the committee is formed with at least 2 women is equal to 1 minus the probability that the committee is formed with no women or only 1 woman.

The number of committees with no women is equal to the number of committees formed by choosing 8 men from 12:

[tex]\binom{12}{8} =495[/tex]

The number of committees with exactly 1 woman is equal to the product of the number of ways to choose 1 woman from 15 and the number of ways to choose 7 men from 12:

[tex]\binom{15}{1}.\binom{12}{7} = 15.792=11,880[/tex]

Therefore, the number of committees with at least 2 women is:

[tex]\binom{27}{8}-\binom{12}{8}-\binom{15}{1}\binom{12}{7} &= 5,311,735 - 495 - 11,880 \ = 5,299,360[/tex].

And the probability is:

[tex]5,299,360/\binom{27}{8}=0.997[/tex]

So the probability that the committee is formed with at least 2 women is approximately 0.997.

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The function g(x) has vertical asymptotes at x = 5 and x = -5, a horizontal asymptote at y = 0, an x-intercept at (-2, 0), and a y-intercept at (0, -2/25).

To determine the asymptotes, intercepts, and multiplicities of the rational function g(x) = (x + 2)/(x^2 - 25), we need to analyze its denominator and numerator separately.

First, we will analyze the denominator x^2 - 25. This is a quadratic polynomial that can be factored as (x - 5)(x + 5). Therefore, the function g(x) has vertical asymptotes at x = 5 and x = -5, where the denominator is equal to zero.

Next, we will analyze the numerator x + 2. This is a linear polynomial that intersects the x-axis at x = -2, where y = 0.

To determine the multiplicities of the asymptotes, we can look at the factors in the denominator. We see that the factor (x - 5) has a multiplicity of 1, while the factor (x + 5) also has a multiplicity of 1. Therefore, the function has simple vertical asymptotes at x = 5 and x = -5.

To summarize:

Vertical asymptotes: x = 5 and x = -5

Horizontal asymptote: The degree of the numerator is less than the degree of the denominator, so there is a horizontal asymptote at y = 0.

x-intercept: (-2, 0)

y-intercept: To find the y-intercept, we set x = 0 and evaluate g(0) = (0 + 2)/(-25) = -2/25.

Therefore, the function g(x) has vertical asymptotes at x = 5 and x = -5, a horizontal asymptote at y = 0, an x-intercept at (-2, 0), and a y-intercept at (0, -2/25).

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The time it will it take him to grade 150 papers is 32 minutes, 4 seconds

It is important to note that proportion is a method of comparison in which two expressions or equations are made equal to each other.

From the information given, we have that;

Mr. B grades a total of 12.5 papers in 2.7 minutes.

Then, for 150 papers, we would have;

If 12. 5 papers = 2.7 minutes

Then 150 papers = x

Cross multiply the values

12.5x = 2.7(150)

multiply the values

12.5x = 405

Divide the values by the coefficient of x, we get;

x = 405/12.5

x = 32 minutes, 4 seconds

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For two fair dices, one is 6 sided and other one 12 sided,

a) The probability mass function values for all probability values is present in above figure 2.

b) The expected value of this discrete random variable is equals to 9.9999.

c) The variance of this discrete random variable is equals to 14.8339.

We have two fair dices, one is 6 sided fair die with values {1, 2, 3, 4, 5, 6} and a fair 12 sided die with values {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}. A discrete random variable is created by rolling the two dice and adding the numerical results together. Now, we have to determine all values. The sample space, S for fair 12 sided die is present in above figure. It is also contains sample space of fair 6 sided die.

a) The probability mass function (pmf) is defined as a function over the sample space of a discrete random variable X which the probability that X is equal to a certain value, that is f(x) = P[X=x]. So,

the probability mass function for the probability of all possible values of this random variable is present in above figure 2.

b) The expected value, E(X), or mean μ of a discrete random variable X, is calculated by multiplying each value of the random variable by its probability and add the products. The formula is , E ( X ) = μ = ∑ x P ( x ), so the table for excepted value determined by using above formula present in above figure 3. So, the excepted value is 9.9999.

d) The variance for discrete variable X is calculated by using the following

[tex]Var(X) = \sum( X - \mu)× P(X)[/tex]

variance value for all probability values is present in above figure. The total sum

= 14.8339

Hence, required variance value is 14.8339.

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For the current is rate of charge flows through a surface, [tex] \frac{ dQ}{dt} = I [/tex], the charge passes through the surface after 9 seconds is equals to 2052 C.

There is amount of charge passing through a surface, by a function Q(t) is measured in coulombs C. The modeled current function, I(t) = 9t²- 4t + 3 --(1)

where t denotes the time in second. We have to determine the charge passes through the surface after 9 seconds. As we know current is defined as a rate at which charge flows through a surface, i.e., [tex] \frac{ dQ}{dt} = I [/tex]. The units used for current is Ampere, A. From equation (1) and (2), [tex]\frac{ dQ}{dt} = 9t² - 4t + 3[/tex]

So, for determining the charge we integrate, the previous equation with respect to the time t, [tex]\int \frac{ dQ}{dt} dt = \int_{0}^{t} I(t) dt = \int_{0}^{9} ( 9t² - 4t + 3) dt[/tex]

[tex]Q =[\frac{9t³}{3} - \frac{ 4t²}{2} + 3t]_{0}^{9}[/tex]

[tex] = 3× 9³ + 27 - 2× 9²[/tex]

= 2052

Hence, required value is 2052 coulombs.

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Complete question:

The amount of charge passing through a surface, given by a function Q(t), is measured in coulombs C. The current is the rate at which charge flows through a surface. This function is I(t) and is measured in amperes, A, or coulombs per second, C/s. If a current for a certain surface is modeled by the function I(t)=9t² −4t + 3 for t≥0, how much charge passes through the surface after 9 seconds? ______________coulombs

The length of side LJ is 12.41.

Since triangle XYZ is similar to triangle JKL, we know that the corresponding sides are proportional. This means that the ratio of the lengths of the sides in triangle XYZ to the corresponding sides in triangle JKL is constant. We can use this fact to solve for the length of side LJ.

Let k be the constant of proportionality. Then we have:

XY / JK = YZ / KL = ZX / LJ = k

Substituting the given values, we have:

8.7 / 13.05 = 7.8 / KL = 8.2 / LJ

Solving for KL and LJ, we get:

KL = (7.8 x 13.05) / 8.7 = 11.70

LJ = (8.2 x 13.05) / 7.8 = 12.41

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Floating strainers can be used to provide the flow required to reach the capacity of a pumping apparatus in shallow water.

Among the given options, the minimum depth for using floating strainers is typically 6 inches (150 mm) (option b).

This depth allows for efficient operation without risking damage or drawing in debris that could hinder the pumping process. When it comes to providing the necessary flow required to reach the capacity of the pumping apparatus, floating strainers can be a useful tool.

These strainers are designed to filter out debris and prevent clogs, ensuring that the water being pumped is clean and free-flowing. However, the effectiveness of a floating strainer is limited by the depth of the water it is operating in.

According to the question, the options for the shallowest depth of water that a floating strainer can be used in range from 3 inches (75 mm) to 1 foot (300 mm).

It's important to note that the shallower the water, the more difficult it may be for a floating strainer to maintain a steady flow. This is because the intake of the strainer may be too close to the bottom of the water source, making it harder for the strainer to draw in water.

In general, it's recommended to use a floating strainer that is appropriate for the depth of water you will be pumping from. This means that if you're working with a water source that is only a few inches deep,

you should opt for a strainer that is designed to work in shallower depths. This will help ensure that the strainer is able to effectively filter out debris and maintain a steady flow of water, which is crucial when using a pumping apparatus.

In conclusion, the answer to the question is a. 3 inches (75 mm) - a floating strainer can be used for water sources as shallow as 3 inches (75 mm),

but it's important to choose a strainer that is appropriate for the To of water you will be working with to ensure that it can maintain a steady flow and effectively filter out debris.

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The period of the pendulum (t) is approximately 4.77 seconds.

The formula for a basic pendulum's period is

T = 2π√(L/g)

where L is the pendulum's length and g is its gravitational acceleration.

Substituting the given values, we get:

T = 2π√(5.64/9.8)

Simplifying the expression inside the square root, we get:

T = 2π√(0.5755)

Calculating the square root, we get:

T = 2π(0.759)

Multiplying by 2 and π, we get:

T = 4.77 seconds (rounded to two decimal places)

Therefore, the period of the pendulum is approximately 4.77 seconds.

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The 99% confidence interval for the proportion of executives who want to strengthen innovation is: CI = (0.199, 0.261)

What is confidence interval?

A confidence interval is a statistical measure that provides a range of values within which the true population parameter, such as the mean or proportion, is estimated to lie with a specified level of confidence.

To find the confidence interval for a proportion, we need to use the formula:

CI = p ± z[tex]\sqrt{(pq/n)[/tex]

where:

CI: confidence interval

p: sample proportion

q: 1 - p

z: z-score from the standard normal distribution for the desired confidence level (99% in this case)

n: sample size

From the problem statement, we know that p = 0.23, n = 1,379, and we want a 99% confidence interval. To find the z-score, we can use a standard normal distribution table or calculator, which gives us a value of 2.576.

Substituting the values into the formula, we get:

CI = 0.23 ± 2.576[tex]\sqrt{(0.230.77/1379)[/tex]

CI = 0.23 ± 0.031

Therefore, the 99% confidence interval for the proportion of executives who want to strengthen innovation is:

CI = (0.199, 0.261)

This means we can be 99% confident that the true proportion of executives who want to strengthen innovation falls within this range.

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