There are 300 sheets of paper in a pile, correct to the nearest 10 sheets. The height of the pile is 160 mm, correct to the nearest 10 mm.
Calculate the upper bound for the thickness of one sheet.

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.