If a building casts a shadow 150 feet from its base, and a yardstick casts a shadow of 2 feet, how tall is the building? this problem can be solved us

What is the smallest integer n such that n\sqrt{2} is greater than 20

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

Need plz been trying to do it for a long time and still haven’t succeeded