Write each rate as a fraction in lowest terms
1. 40 feet in 15 seconds
2. 10 feet in 15 seconds
3. 25 feet in 40 seconds 50 feet in 35 seconds
4. 30 feet in 45 seconds
5. 40 feet in 45 seconds
6.

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?