which type of sampling is used when the researcher needs to seek select key individuals who have relevant information

Answer:

indicates the relationship of two variables whenever one variable changes.

Step-by-step explanation:

Answer:

20/29

Step-by-step explanation:

Recall that cosine of an angle is the side adjacent to it over the hypotenuse (SOH-CAH-TOA).
For this question the ratio is: 20/29

Answer: f = 2/5 (0.4)

Step-by-step explanation:

1. Re-order terms so constants are on the left

f x 5 = 2 OR f(5)=2

2. Divide both sides by the same factor

f(5)=2 --> 5f/5 = 2/5

The answer is (b) 0.

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No, the variances are not similar enough to use the pooled t test. The ratio of the two variances (25/8) is greater than 3, which is the typical cutoff for determining similarity of variances. Therefore, an alternative method such as the Welch's t-test or a non-parametric test should be used to compare the means.

To determine if the variances are similar enough to use a pooled t-test, you can perform an F-test for equality of variances. Follow these steps:

1. Calculate the F statistic by dividing the larger variance by the smaller variance: F = var2 / var1 = 25 / 8 = 3.125.

2. Determine the degrees of freedom for each group: df1 = 10 - 1 = 9 and df2 = 10 - 1 = 9.

3. Check the F critical value for the given degrees of freedom and chosen significance level (e.g., 0.05) using an F-distribution table or a calculator. For df1 = 9 and df2 = 9 at a 0.05 significance level, the F critical value is approximately 3.18.

4. Compare the calculated F statistic to the F critical value: 3.125 < 3.18.

Since the F statistic is less than the F critical value, we fail to reject the null hypothesis that the variances are equal. Therefore, the variances are similar enough to use the pooled t-test to evaluate differences in the means. The answer is yes.

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Answer:

0.5(−y−2)+y=1

(0.5)(−y)+(0.5)(−2)+y=1

−0.5y+−1+y=1

(−0.5y+y)+(−1)=1

0.5y+−1=1

0.5y−1=1

0.5y−1+1=1+1

0.5y=2

0.5y /0.5 = 2/0.5

y=4

Step-by-step explanation:

I hope this is help you

Answer:

\(0.5( - y - 2) + y = 1 \\ - 0.5y - 1 + y = 1 \\ - 0.5y + y = 1 + 1 \\ 0.5y = 2 \\ y = \frac{2}{0.5} \\ y = 4\)

Answer:

16.1%

Step-by-step explanation:

Answer:

15.0

Step-by-step explanation:

Answer:

Solutions: (-5, 1), (-10, 1), (-10, 5)

Non-solutions: (0, 4), (5, 4), (10, 4)

Step-by-step explanation:

Solutions are in the shaded area. Non-solutions are in the non-shaded area and on the dashed line.

Solutions: (-5, 1), (-10, 1), (-10, 5)

Non-solutions: (0, 4), (5, 4), (10, 4)

Answer:

s=6

Step-by-step explanation:

Answer:

s = 6

Step-by-step explanation:

Given: -2s + 8(9 - s) = 3 - (9 - 3s)

Get rid of the brackets by using the distributive property:

-2s + 72 - 8s = 3 - 9 + 3s

You can rearrange the items so the expression is easier to solve:

-2s - 8s + 72 = 3s + 3 - 9

Combine like terms:

-10s + 72 = 3s - 6

Now let's subtract 72 from both sides of the expression:

-10s = 3s - 78

Next, subtract 3s from both sides of the expression:

-13s = -78

Lastly, divide each side of the expression by -13 to get:

s = 6

Hope this helped!

Answer:

5 feet 4.4 inches tall

Step-by-step explanation:

Answer: √58

Step-by-step explanation:

Distance (d) = √(-2 - 1)2 + (3 - -4)2

= √(-3)2 + (7)2

= √58

Among the provided functions, the ones that approach positive infinity as x approaches negative infinity are:

- f(x) = 2x^5

- f(x) = 6x^8 + 9x^6 + 32

- f(x) = -x + 8x^4 + 248

To determine which functions approach positive infinity as x approaches negative infinity, we need to analyze the leading terms of the functions. The leading term dominates the behavior of the function as x becomes very large or very small.

Let's examine each function and identify their leading terms:

1. f(x) = 2x^5

The leading term is 2x^5, which has a positive coefficient and the highest power of x.

As x approaches negative infinity, this term becomes very large and positive, indicating that f(x) approaches positive infinity.

2. f(x) = 9x + 100

The leading term is 9x, which has a positive coefficient but a lower power of x compared to the constant term 100.

As x approaches negative infinity, the leading term becomes very large and negative, indicating that f(x) approaches negative infinity, not positive infinity.

3. f(x) = 6x^8 + 9x^6 + 32

The leading term is 6x^8, which has a positive coefficient and the highest power of x.

As x approaches negative infinity, this term becomes very large and positive, indicating that f(x) approaches positive infinity.

4. f(x) = -8x^3 + 11

The leading term is -8x^3, which has a negative coefficient and the highest power of x.

As x approaches negative infinity, this term becomes very large and negative, indicating that f(x) approaches negative infinity, not positive infinity.

5. f(x) = -10x + 5x + 26

Combining like terms, we have f(x) = -5x + 26.

The leading term is -5x, which has a negative coefficient but a lower power of x compared to the constant term 26.

As x approaches negative infinity, the leading term becomes very large and positive, indicating that f(x) approaches negative infinity, not positive infinity.

6. f(x) = -x + 8x^4 + 248

The leading term is 8x^4, which has a positive coefficient and the highest power of x.

As x approaches negative infinity, this term becomes very large and positive, indicating that f(x) approaches positive infinity.

Therefore, the correct choices are:

- f(x) = 2x^5

- f(x) = 6x^8 + 9x^6 + 32

- f(x) = -x + 8x^4 + 248

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Answer:

C. 9

Step-by-step explanation:

15/100*60

3/20*60

180/20

9

Answer:

The answer is 9

Step-by-step explanation:

15% * 60

"OF" mean multiplication so we multiple

¹⁵/100 * 60

we cancel "Zero cancel Zero"

we left with

¹⁵/10 * 6

but we can make the fraction to be uniform

so we say ¹⁵/10 * ⁶/1

we multiply

15 * 6=90

10 * 1=10

⁹⁰/10

we divide

10 into 90 is 9

10 into is 1

so we say ⁹/1 is the same as 9.

Hence our answer is 9

Answer:

scientific notation

= 2.34e8

scientific e notation

= 234 × 106

engineering notation

million; prefix mega- (M)

= 2.34 × 108

standard form

8

Order of Magnitude

for scientific and standard forms

= 234000000

(real number)

= two hundred thirty-four million

word form

Step-by-step explanation:

The first law of thermodynamics is a fundamental principle in physics that states energy cannot be created or destroyed, only converted from one form to another. It can be expressed in terms of heat and work through the equation:

ΔU = q - w

where ΔU represents the change in internal energy of a system, q represents the heat added to the system, and w represents the work done on or by the system.

Now, let's address when the quantities q and w would be negative numbers.

1) When q is negative: This occurs when heat is removed from the system, indicating an energy loss. For example, when a substance is cooled, heat is extracted from it, resulting in a negative value for q.

2) When w is negative: This occurs when work is done on the system, decreasing its energy. For instance, when compressing a gas, work is done on it, leading to a negative value for w.

In both cases, the negative sign indicates a reduction in energy or the transfer of energy from the system to its surroundings.

In summary, the first law of thermodynamics can be expressed as ΔU = q - w, and q and w can be negative numbers when energy is lost from the system through the removal of heat or when work is done on the system.

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The money market account earns 8/4 = 2% interest per quarter.

In one year, there are 4 quarters.

so, the formula to calculate the balance after 8 years is:

A = P (1 + r/n)^(nt)

where A is the final balance, P is the principal (initial investment), r is the annual interest rate, n is the number of times interest is compounded per year, and t is the number of years the money is invested for.

Substituting in the given values,

A = 1000 (1 + .02)^(4*8)

A = 1000 (1.02)^32

A = 1000 (1.8587)

A = 1858.7

So after 8 years, Ed will have earned $1858.7.

Answer

20

Step-by-step explanation:

Because if she uses only 40 instead of 50 she just subtracting 10.

Based on the calculations, the value of number x is equal to 22.

In order to determine the value of x, we would translate the word problem into an algebraic expression.

For the expression, six less than twice a number x is given by:

2x - 6.

Next, we would equate it to 38:

2x - 6 = 38

2x = 38 + 6

2x = 44

x = 44/2

x = 22.

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Answer:

You would need transformations to solve this.

Answer:

B (-50, 10)

Step-by-step explanation:

You would multiply the original (x, y) coordinates by the scale factor 10, so

10* (x, y) =

10(-5, 1) =

Distribute 10 to multiply with -5 and 1 separately

   x      ,     y

(10 * -5), (10 * 1)

(-50, 10)

May have the wording wrong, but think I got the calcualtion right.

Answer:

-11

Step-by-step explanation:

9+35=44. 34+21=55. - each other=-11

We need to calculate the present value of benefits for each machine using a discount rate of 15%. The machine with the higher present value of benefits would be the better investment choice.

Without the specific data for each machine, it is difficult to determine which machine should be selected. However, we can use the given minimum acceptable rate of return (MARR) of 15% to evaluate the machines. The MARR represents the minimum rate of return that an investor or company expects to earn on an investment. If the benefits from each machine exceed the MARR, then the investment is considered worthwhile.

Assuming that the benefits for each machine are constant over all years, we can compare the present value of benefits for each machine to determine which one should be selected. The machine with the higher present value of benefits would be the better investment choice.

Therefore, we need to calculate the present value of benefits for each machine using a discount rate of 15%. The machine with the higher present value of benefits would be the better investment choice.

In conclusion, without the specific data for each machine, we cannot determine which machine should be selected.

However, we can use the MARR of 15% to evaluate the machines and determine which one has the higher present value of benefits.
To determine which machine should be selected, we need to compare the present worth of benefits of both machines X and Z using the given MARR (Minimum Attractive Rate of Return) of 15%. The steps to calculate the present worth of benefits are:

1. Identify the benefits and costs associated with each machine.
2. Calculate the net benefits (benefits - costs) for each machine.
3. Determine the present worth of net benefits using the MARR of 15%.
4. Compare the present worth of net benefits of both machines and select the one with the higher value.

Please provide the data for machines X and Z, including costs, benefits, and the duration for which they will be in use, so that we can proceed with the calculations and recommend the best machine based on the given MARR of 15%.

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(2x + 3) (x^2 - 6x + 9)

Answer:

C

Step-by-step explanation:

Answer:

5x + 7

Step-by-step explanation:

\(2(x - 4) + 3(x + 5) = 2x - 8 + 3x + 15 = 5x + 7\)

The Volume of the right cone (V) that has a diameter of 6 units and a height of 11 units is calculated as: 33π units³.

The volume of a right cone can be determined by applying the following formula:

Volume of a right cone (V) = 1/3 * πr²h, where:

r represents the radius of the right cone

h represents the height of the right cone

Given the following:

radius (r) = 6/2 = 3 units

Height (h) = 11 units

Plug in the values:

Volume of the right cone (V) = 1/3 * π * 3² * 11

= 1/3 * π * 99

= π * 33

Volume of the right cone (V) = 33π units³

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Step-by-step explanation:

T3=8

8=a+2d

where a is first term ,d is common ratio

8=a+2(2)

8=a+4

a=8-4

a=4

first term T1 is 4

T2=a+d

T2=4+2

T2=6

T4=a+3d

T4=4+3(2)

T4=4+6

T4=10

T5=a+4d

T5=2+4(2)

T5=4+8

T5=12

4,6,8,10,12

The solution of the expression 2B - 2C is,

⇒ - 2q² - 4q + 20

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

⇒ B = 2 - q²

⇒ C = 2q - 8

Now, We can find the value of expression as,

⇒ 2B - 2C

⇒ 2 (2 - q²) - 2 (2q - 8)

⇒ 4 - 2q² - 4q + 16

⇒ - 2q² - 4q + 20

Thus, The value of expression is,

⇒ - 2q² - 4q + 20

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She uses 1/2 quart of yellow paint for every 9/2 quarts of blue paint. Then, she uses 1/2 quart of yellow paint for every 1/2 + 9/2 = 10/2 = 5 quart of paint.

We can use the next proportion:

Solving for x:

She uses 1/10 quart of yellow paint for every quart of paint

The description that most accurate for a Zero-Based Budget is:

b. You put every dollar of your take-home pay into a budget category each month.

A zero-based budget is a budgeting method in which your total income minus your total expenses equals zero. This means that every dollar of your income is assigned a specific purpose, either to be saved or spent on specific expenses. The goal of this method is to ensure that you have accounted for all of your income and that you do not have any leftover funds that are not allocated to a specific purpose. In this sense, option b, "You put every dollar of your take-home pay into a budget category each month" is the most accurate description of a zero-based budget.

A zero-based budget can be applied to any source of income, whether it be a salary, freelance work, rental income, or any other type of income. The key is to allocate every dollar of that income to a specific purpose, such as savings, expenses, or investments, to ensure that all of the income is accounted for. This budgeting method can help individuals and households to better manage their finances by ensuring that they are not overspending and that they have a plan for all of their income.

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Answer:

-22 x ( -58/209) = 116/19

Step-by-step explanation: