Write in words/formula what is needed to do the problem

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Precalculus question, image attached.

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.