I need help ASAP please!

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Which of the following statements is a true conclusion that can be made from the scaled bargraph?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?