Bruce has a 16 ounces bottle of water that is 1/2 full. he drinks 1/5 of the water left in the bottle. how many ounces of water are left in the bottle

15 points ! ~ see if you know the answer to both you!

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

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