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3 years ago

I WILL GIVE BRIANLIEST TO THE FIRST PERSON TO ANSWER 13,14,15 AND EXTRA POINTS

Mathematics

1 answer:

Soloha48 [4]3 years ago

5 0

Answer:

Hello! answers:

Question 13: 12

Question 14: 18

Question 15: 15

Hope that helps!

For question 13 I found the answer by doing 6 ÷ 2 and 6 ÷ 2 = 3 so I know that 4 will be enlarged by 3 so 4 × 3 = 12 so 12 is the answer for 13

For question 14 I found the answer by using 1 of the sides so I did 24 ÷ 16 and 24 ÷ 16 = 1.5 and 1.5 × 12 = 18 so the answer is 18

For question 15 I did the same thing!

25 ÷ 20 = 1.25 and 1.25 × 12 = 15 so 15 is the answer Hope that helps!

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Annual starting salaries for college graduates with degrees in business administration are generally expected to have a populati

valkas [14]

Answer:

A sample of 139 should be taken.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Population standard deviation of $3,000.

This means that $\sigma = 3000$

How large a sample should be taken if the desired margin of error is $500?

A sample of n is needed.

n is found when M = 500. So

$M = z\frac{\sigma}{\sqrt{n}}$

$500 = 1.96\frac{3000}{\sqrt{n}}$

$500\sqrt{n} = 1.96*3000$

Dividing both sides by 500

$\sqrt{n} = 1.96*6$

$(\sqrt{n})^2 = (1.96*6)^2$

$n = 138.3$

Rounding up:

A sample of 139 should be taken.

7 0

3 years ago

A simple one-celled organism divides into two identical

kolezko [41]

24 single felled organisms there are to 30 minute periods in each hour which produces 2 organisms that is 12 periods and 12 multiplied by 2 is 24

8 0

3 years ago

Subtract and simplify: (13x^2 + 2) - (4x^2 + 2x - 7)

Gnesinka [82]

(13x² + 2) - (4x² + 2x - 7) =
13x² + 2 - 4x² - 2x + 7 =
9x² - 2x + 9

7 0

4 years ago

Read 2 more answers

HELP ME PLEASE The student's in Roberto's school are painting a mural that will be 8 feet by 15 feet. First they make a scale dr

DochEvi [55]

Answer:

Length = 3.2feets ; width = 6feets

Step-by-step explanation:

Given the following :

Actual dimension of Mural:

8feets by 15feets

Scale drawing ratio of Mural :

2feets : 5feets

This means :

2 Feets on paper equals 5 Feets of actual drawing:

Therefore, with actual dimension of Length = 8feets ;

Length of scale drawing = (2/5) * 8 = 3.2feets

Actual dimension of width 15feets ;

Width of scale drawing = (2/5) * 15 = 6 Feets

3 0

3 years ago

I have a math problem and it looks like this how would i answer it

neonofarm [45]

Answer:

the blank would be 640

Step-by-step explanation:

I'm just going to assume this is a question where you have to complete the pattern

Every time a new number is added, the number is one less then the one before.

I know that makes 0 sense so here:

610+9=619

619+8=627

627+7=634

634+6=640

640+5=645

So 640 would be the only one that makes sense

I hope I was correct and I helped you out!

4 0

3 years ago