Find the value of each variable. Round the lengths to the nearest tenth and the angle measures to the nearest degree. PLEASE HELP!!! AND SHOW HOW YOU GOT YOUR ANSWER

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.