A cylinder and a cone are stacked on top of each other. They both have 2-foot diameters and heights of 9 feet. What is the combined volume, in cubic feet? Use 3.14 for pie

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

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12