PLEASE HURRY I WILL MARK BRAINLIEST A triangle with an area of 646 m2 has a height of 68 m. What is the length of the base of the triangle?
Base =

Brent wants to know what is 5 x 1/2

This is about circle theorems. someone asap : (

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.