We are studying the proportion of cities that have private garbage collector. we want a maximum error of 0.10 and a 95% confidence level, and tentatively estimate the proportion at 0.50. what is the minimum number of cities we need to contact?

Sorry guys but as you have a small brain

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.