Each Purse Contains 8 Coins. Find A rule to give the total number of coins in 'n' purses.

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Which is the completely factored from of xy^3-x^3y

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