Factor −6 out of −18a−30 is you get it write. it is worth 15 points

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.

Answer! if you don’t mind, can you explain

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?