I need help with #53 to #60 ASAP … please help this I don’t understand this …. I need to get it done before Monday that’s when it is due

Asap 25 pts brainliest to right best/answer

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

How to find the exponential function y=ca^x, with points (1,2) and (2,1)