Doug bought land for $8000 in 2015. Its value decreased at a rate of 2.5% per year. How much was the land worth, to the nearest dollar, in 2020? a. $7048

b. $7049

c. $9050

d. $9051

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