Find the first, fourth, and eighth term of the sequence a(n)=-3x2 ^n-1

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l

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

Having a hard time understanding this question (see attachment).