Pete spends 3/5 of his monthy pay on rent, 1/8 on bills and then spends half of what is left on food. if his monthly pay is $820, how much does he have left at the end of the month?

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?