I'll give the Brainiest! Peter wants to put 2 coats of paint on both the inside and outside of the walls. There are 5 walls, each side having 45 ft^2 of paintable surface. A gallon of paint covers x ft^2. Explain how to write an expression to represent the number of gallons of paint Peter needs.

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.

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4