Suppose a population has a mean of 400 and a standard deviation of 24. if a random sample of size 144 is drawn from the population, the probability of drawing a sample with a mean between 395.5 and 404.5 is

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?

Robert is placing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod costs y dollars per square foot