Surveys conducted in American high schools concluded that 90% of the students in a sample of 400 students had more than one active email account. What would the margin of error be for the population proportion?

A. 1.5%

B. 3%

C. 4.5%

D. 9%

How invented all of the numbers

Tiffany is filling her daughters pool with water from a hose. She can fill the pool at a rate of 1/10 gallons/second. Create at least three equivalent ratios that are associated with the rate. Use a double number line to show your work.

If there are 13 values in a data set in order from smallest to largest what is the first quartile of the data set a. The mean of the 4th and 5th values b. The mean of the 3rd and 4th values c. The mean of the 2nd and 3rd values d.

How many times does 8/ 3 go into 2/ 3 ?

Anna started a race at 9:30am. She ran for 3 hours and 47 minutes. What time did she finish her race?

On a recent day, one U. S dollar was worth 0.64 euros. If you were to exchange 126 euros on that day, how many U. S. dollars would you have received? $64.00 $80.64 $126.00 $196.88

What is larger, 5/8 or 7/15's?

The water level in a tank can be modeled by the function h (t) = 8cos (pi t / 7) + 11.5, where t is the number of hours since the water level is at its maximum height, h.

The school is 2 kilometers away from the town library what is the distance in meters

Why is 3.125 repeating equal to 3 1/8?