Laura invests $2,000 in a bank account where she earns simple interest at a rate of 6.4% per year. 1. In total, how much interest will Laura receive after 18 years?

2. In total, how much will be in Laura's account after 30 years?

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

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.