Subtract the following rational expressions.
9x2 +3 / 14x2 – 9 -
3x2 + 5 / 14x2 – 9 = 1

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.