Answer:

**Answer:**

538 books should be tested.

**Step-by-step explanation:**

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

**Now**, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so

**Now**, find the margin of error M as such

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

**How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?**

n books should be tested.

n is found when

We have that

Rounding up

538 books should be tested.

The short answer please

Can someone plz help me solved this problem! I’m giving you 10 points! I need help plz help me! Will mark you as brainiest!

Please help me understand I am confused

A physical education class has 21 boys and 9 girls. Each day, the teacher randomly selects a team captain. Assume that no student is absent. What is the probability that the team captain is a girl two days in a row?The probability of choosing a captain that is a girl two days in a row is 9%.

A jar contained 8 balls: 6 red, 1 green and 1 blue. We randomly take a ball out of the jar. Once a ball is selected we do not put it back. We keep selecting balls until for the first time we get a blue one. We count the number of times we had to draw a ball, (including the last drawing) until we actually got the blue ball. How many elements are in the sample space for this experiment

Can someone plz help me solved this problem! I’m giving you 10 points! I need help plz help me! Will mark you as brainiest!

Please help me understand I am confused

A physical education class has 21 boys and 9 girls. Each day, the teacher randomly selects a team captain. Assume that no student is absent. What is the probability that the team captain is a girl two days in a row?The probability of choosing a captain that is a girl two days in a row is 9%.

A jar contained 8 balls: 6 red, 1 green and 1 blue. We randomly take a ball out of the jar. Once a ball is selected we do not put it back. We keep selecting balls until for the first time we get a blue one. We count the number of times we had to draw a ball, (including the last drawing) until we actually got the blue ball. How many elements are in the sample space for this experiment

**Answer:**

155°

**Step-by-step explanation:**

The angle between the x and y axes is 90°. Adding 65° to that angle gives an angle measure of ...

... 90° +65° = **155°**

Yes yes I will love to see if you get it right it is 12050

A = event that you select a black sweater

P(A) = 2/5 since there are 2 black out of 2+3 = 5 total

After you make a selection, we have the event

B = event that you select another black sweater assuming event A has happened already

P(B) = 1/4 because there's 1 black sweater left out of 5-1 = 4 left over

Multiply the probabilities

P(A and B) = P(A)*P(B)

P(A and B) = (2/5)*(1/4)

P(A and B) = 2/20

P(A and B) = 1/10

The answer as a fraction is 1/10

In decimal form, it is 0.1

As a percent, the answer is 10%

P(A) = 2/5 since there are 2 black out of 2+3 = 5 total

After you make a selection, we have the event

B = event that you select another black sweater assuming event A has happened already

P(B) = 1/4 because there's 1 black sweater left out of 5-1 = 4 left over

Multiply the probabilities

P(A and B) = P(A)*P(B)

P(A and B) = (2/5)*(1/4)

P(A and B) = 2/20

P(A and B) = 1/10

The answer as a fraction is 1/10

In decimal form, it is 0.1

As a percent, the answer is 10%

Answer:

1.98 meters

Step-by-step explanation:

divide 7.92 by 4

(7.92)/4

1.98

**Answer: 7 (x+4)**

**Step-by-step explanation: **Since the expression asks for 7 times the sum of a number and 4, you would put x + 4 in parentheses since multiplying 7 comes afterwards.

**Answer:**

1. 5 / 6

2. 1 / 3

3. 3 / 6 or 1 / 2

**Step-by-step explanation:**

The probability that A is not yellow is 5 / 6

The probability that B is blue is 1 / 3

The probability that A is red is 3 / 6 or 1 / 2