What is 1 divided by 9 to the second power?

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

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)