A toy has various shaped objects that a child can push through matching holes. The area of the square hole is 8 square centimeters. The volume of the cube-shaped block is 64 centimeters. Part A: what edge length can you find?explain
Part B:Will the block fit in the square hole?explain

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.