5.3.4 Practice: Modeling: Finding Parallelograms Please help (I am giving 100 points and will make brainiest)

I have attached the questions on a PDF down below

Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. 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.