Functions and linear

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?

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry