Pau is standing in front of a museum exhibition. whe he turn his head 60 degrees to the left he can see a sttue by bonatello. when he turns his head 60 degrees to the right, he an see a staty by della robbia. the two statues and paul form the vertices of a triangle. classify this triangle as acute, right or obtuse

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.