The total profit p (in millions of dollars) earned by a company from 1995 to 2004 can be modeled by p=3500+500t/98-t where t is the number of years since 1995. the number n (in hundreds of thousands) of units sold can be modeled by n=(t+7)(3000-20t)/490-5t whete t is the number of years since 1995. write a model that gives the profit earned per unit per year. then approximate the profit per unit in 2002.