Jim believes he will receive 50 pieces of candy for halloween. if jim actually received 75 pieces of candy, what is jim's percent error? round your answer to the nearest tenth of a percent.

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.