Al predicted that he would sell 220 hot dogs at lunch time. when the hot dogs ran out, 35 people were still waiting in line to buy hot dogs. what was the percent error in the estimate? round the answer to the nearest tenth. –15.9% –13.7% 13.7% 15.9%

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?