Determine if the following relations are functions. If they are functions, also state the domain and range.

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?

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25