Answer plz quick and fast what the answer quick

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?

Icould really use some with this question.

What is not true about kl and mn? what is mn? (show )