Someone please help me with my Algebra 1 assignment, I only need answers for 2 3 and 5 if possible!! Thanks

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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.

How does reflecting or rotating a figure change the interior angles of the figure?