PLEASE HELP 100 POINTD. The ideal speed of an elevator is 120 feet/minute. But the elevator's speed is allowed to vary by less than a certain amount. Identify the graph of
the variance levels that indicate unacceptable elevator speeds.

Alocal concert promoter purchases 2 3/4 pages of ads. when one of the concerts is cancelled, the promoter cancels 1 5/8 pages of ads. how much advertising space is the concert promoter actually using?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?