how much water was left in the tank when the aquarium workers finally caught the LIE based on the level of the water were fish sick

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 there an x intercept in the equation 60*1.15^x

What function has a range {yly< 5}? question on picture above^