Sally has made a scale drawing of the airplane, in which the wingpsan is 10 inches and the tailspan is 3 inches. what is the actual tailspan of the airplane?
a) 7.2 feet
b) 13 feet
c) 14.2 feet
d) 18.4 feet

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