Help me pls, tysm! I will give if you give me the right answer, tysm! I need help on number 6 btw

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?

Explain why the factor 1.5 is broke. into two numbers in the model.

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount