Houseflies have pretty short lifespans. Males of a certain species have lifespans that are strongly skewed to the right with a mean of 26 days and a standard deviation of 12 days. A biologist collects a random sample of 10 of these male houseflies and observes them to calculate the sample mean lifespan. We can assume that the houseflies in each sample are independent.

What is the probability that the mean lifespan from the sample of 10 houseflies xˉ is less than 24 days?

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.

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers?

Which expression is equivalent to 64 - 9x^2?