Find the volume of a pyramid with a square base, where the area of the base is 7.5 ft? and the height of the pyramid is 4.6 ft. Round your answer to the nearest tenth of a
cubic foot

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers. a) one of the 400 passengers is selected uniformly at random. let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?