The price of a sandwich decreases from $6 to $4. What is the percent decrease in the price of the sandwich?

Which of the following expressions is equal to 2x^2+8

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

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?