Which difference can be found without regrouping? Select all that apply. 45.20-29.59 36.57-25.56 100-89.5 29.8-28.3 13.25-1.23

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?