A plane descends from 1500 feet to 1000 feet in 5 minutes. At what rate (in feet per second) is the plane descending? A. 500 feet per second
B. 100 feet per second
C. -100 feet per second
D. -500 feet per second

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

Standard deviation of 19,29,21,22,23

At 6 1/2 cents per pound of string beans how much does 7 pounds cost