Find the frequency of tones that are one and two octaves lower than the starting tone of 2840 cycles per second.

What is the value of x? enter your answer in the box. (cm)

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

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