Adrilling machine can drill 12 holes in 6 minutes. if the machine drills holes at a constant speed, it can drill holes in 25 minutes.

Which equation represents the partial sum of the geometric series?

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

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)