What is the interest on $25,000 at a rate of 4.75% for 36 months? $28,562.50
$3562.50
$4,275,000
$257.50

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?