Ron is conducting an experiment on the growth of bacteria after a certain number of hours in a petri dish. The number of bacteria, a, gradually increases over 8 hours to an amount, b, several hundred thousand times greater than a. Which of the following functions would best model the situation above? A. logarithmic B. absolute value C. step D. polynomial

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