It takes about 20 minutes to grade a student’s paper. how long, in hours, does it take to grade papers for a class of 25 people?

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

Vinny is interviewing for a job. he wants his take home pay to be at least $42,000.what is the least salary he can earn if he pays 25% income tax?