Dave has $3000 more in a passbook account than in a money market. The passbook account pays 8%, and the money market account pays
10%. How much is invested in each account if the annual interest that he
gets on the 8% investment is $80 more than the interest on the 10%
investment?

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.