1. For the period 1998-2003, the number y of cassettes (in millions) in manufacturers' shipments can be modeled by the function y = 4.3x2 - 50.4x + 162 where x is the number of years since 1998. In what year
were 50 million cassettes shipped?

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.