An accepted relationship between stopping distance, d in feet, and the speed of a car, v in mph, is d(v) = 1.2 v + 0.04 v^2 on dry, level concrete. (a) How many feet will it take a car traveling 40 mph to stop on dry, level concrete? (b) If an accident occurs 200 feet ahead, what is the maximum speed at which one can travel to avoid being involved in the accident?

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

The weekly revenue for a company is r = 3p^2 + 60p + 1060, where p is the price of the company's product. what price will result in a revenue of $1200.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?