Atable with 4 legs will sometimes wobble if one leg is shorter than the other three, but a table with three legs will not wobble. which postulate substantiates this fact

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.

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

What is the circumference of the pie