Brianna deposited $680 into a savings account that pays simple and your interest rate of 1.29% how much interest will she earn after three years? a. $8.77 b.$15.81 c.$20.40 d.$26.32

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?