-8 + 5x - 2 = 20 solve

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?

Is a positive integer raised to a negative power always positive

Adeposit of 5500 at 6% for 3 years equals