Jerry sells a particular type of coin online. The amount he charges his customers for the coin includes shipping. Jerry uses the equation shown below to determine the total amount (y), in dollars, he will charge for x coins. y=32.95x+12.95

A. How much does Jerry charge a customer for 10 coins?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.