How do u work out the problem 5/6 × 22/3

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?

Which value would be a solution for x in the inequality 47-4x< 7

Precalculus question, image attached.