Of all the different permutations of the letters in the word STOP, if you choose one at random, what is the probability that it will start with the letter P?
(the answer is a fraction)

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.