a delivery driver expects to take 25 minutes to get from his depot to a garage.15 minutes to collect a car part. and another 25 minutes to drive back to the depot. how In total does he expect to be away from the depot?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?