Agroup of customer service surveys were sent out at random. the scores were 90, 50, 70, 80, 70, 60, 20, 30, 80, 90, and 20. find the mean score.

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.