If 10 miles is about 16 km and the distance between two towns is 45 miles use a ratio table to find the distance between the towns in kilometers

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?