The ratio of peaches, plums and pears is 1:4:2 respectively. If the total number of fruits is 63, how many
plums are there?
Number of plums =

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.