How do i solve this inequality? 13 > x-7

Regular price is $77.00 and the discount is 5% find the sale price

How do i do this activity, is appreciated

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?