The perimeter of an envelope is 34 in. it is 12 in wide. how tall is it?​

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?

Long division the problem is 40 ➗ 348 = ?