7. The number of fish, f, in Skipper’s Pond at the beginning of each year can be modeled by the equation f(x) = 3(2^x), where x represents the number of years after the beginning of the year 2000. For example, x = 0 represents the beginning of the year 2000, x = 1 represents the beginning of the year 2001, and so forth. According to the model, how many fish were in Skipper’s Pond at the beginning of the year 2006 ?