Help please I need the steps for each problem. No websites will be allowed and if your just going to put a radon answer tire reported

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?

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Which function has the domain x> -11