Adrianne invested $2000 in an account at a 3.5% interest rate compounded annually. she made no deposits or withdrawals on the account for four years. determine to the nearest dollar the balance in the account after the four years

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?