All categories

3 years ago

Please help! What the values of the expression? A. 3 B. 12 C. 27 D.81

Mathematics

2 answers:

Leya [2.2K]3 years ago

5 0

I think it’s 12 but correct me if i’m wrong

Sergeu [11.5K]3 years ago

4 0

Answer:

D. 81

Step-by-step explanation:

I am in the same class as you, I took the quiz and the answer was 81

You might be interested in

Help please if you can thanks

8_murik_8 [283]

Answer:

A. 8

Step-by-step explanation:

1kg=2.2

18.5 lbs= 8kg

5 0

3 years ago

Read 2 more answers

eu (european union) countries report that 46% of their labor force is female. The United Nations wnats to determine if the perce

Brrunno [24]

Answer:

Step-by-step explanation:

The question is incomplete. The complete question is:

EU (European Union) countries report that 46% of their labor force is female. The United Nations wants to determine if the percentage of females in the U.S. labor force is the same. Based on a sample of 500 employment records, representatives from the United States Department of Labor found that the 95% confidence interval for the proportion of females in the U.S. labor force is 0.357 to 0.443. If the Department of Labor wishes to tighten its interval, they should:

A. increase the confidence level

B. decrease the sample size

C. increase the sample size

D. Both A and B

E. Both A and C

Solution:

Confidence interval for population proportion is written as

Sample proportion ± margin of error

Where sample proportion is the point estimate for the population proportion.

Margin of error = z × √pq/n

The z score for 95% confidence level is 1.96

p = 46/100 = 0.46

q = 1 - p = 1 - 0.46

q = 0.54

n = 500

Margin of error = 1.96√0.46 × 0.54/500 = 0.044

To tighten it's interval, the margin of error needs to be reduced.

If we increase the confidence level, say to 99%, z = 2.58

Then

Margin of error = 2.58√0.46 × 0.54/500 = 0.058

It increased

Also, If we increase the sample size, say to 700, then

Margin of error = 1.96√0.46 × 0.54/700 = 0.037

It has reduced

Therefore, the correct options is

C. increase the sample size

8 0

3 years ago

Which personal item of information should always be safeguarded to help secure your identity from theft?

enot [183]

Mothers birth date cuh

7 0

3 years ago

What is the answer for the quotient

AysviL [449]

Answer:

0.91666666666

Step-by-step explanation:

if its wrong tell me

7 0

3 years ago

Read 2 more answers

Find the equation of line (use exact numbers)

maw [93]

Answer:

$y=3x+3$

Step-by-step explanation:

Use the slope-intercept form:

$y=mx+b$

m is the slope and b is the y-intercept. The y-intercept is the place where x is equal to 0, and the slope is the change in the y-axis over the change in the x-axis, otherwise known as rise over run ( $\frac{rise}{run}$ ).