In an all boys school, the heights of the student body are normally distributed with a mean of 68 inches and a standard deviation of 2 inches. Out of the 499 boys who go to that school, how many would be expected to be between 67 and 70 inches tall, to the nearest whole number?

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

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

The multiplicative property of equality states that for real numbers a, b, c, and d, if a = b and c = d, then ac = bd. true false