Can someone answer this question, and give me the work?

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?

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.