Which of the following fractions are less than or equal to 0.66? select all that apply. d 9/14 c 33/50 a 3/7 b 4/9

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?