The peak rate of a phone company is 22 cents per minute, and the off-peak rate is 12 cents per minutes. Find the savings for a 44-minute phone call if it was made during off-peak time as opposed to peak time.

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.