In march, isaiah and freddie had the same amount of money in their savings accounts. in april, isaiah deposited $210 into his account. freddie increased the money in his account by 15%. when they compared their balances, they found that they were still equal. how much money did they both have in their accounts in march? enter your answer in your box.

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.