I need help please help me

Can any one me with the answers to these questions asap?

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?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)