Me. i've been trying to solve this question for an hour but i didn't find any 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

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube