Anyone want free points

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?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Which number produces a rationale number when multiplied by 1/5