In a survey of 1,800 people who owned a certain type of car, 990 said they would buy that type of car again. What percent of the people surveyed were satisfied with the car?

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 area of square garden is 300m squared. how long is the diagonal?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?