Which best explains what determines whether a number is irrational? A. a number that can be written as a decimal that terminates and does not repeat

B. a number That can be written as a decimal that neither repeats nor terminates

C. A number that can be written as a decimal that repeats and does not terminate

D. A number that can be written as a square root that does not result in a hole number

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