Sam has 15 identical rectangular windows in his home. the length of each window is
twice the width, and the area of each window is 8 square feet. sam wants to put
weather stripping around the perimeters of all the windows.
if the weather stripping costs $0.25 per foot, how much will he spend?

Need on this geometry question. explain how you did it.

On a cm grid, point p has coordinates (3,-1) and point q has coordinates (-5,6) calculate the shortest distance between p and q give your answer to 1 decimal place

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.