Find the speed of a car that takes 200 feet for a car to stop. Use the equation y=.005x^2 + .10x +5, where y is the distance it takes to stop and x is the speed of the car.

Find the speed of a car that takes 200 feet for a car to stop. Use the equation y=.005x^2 + .10x +5, where y is the distance it takes to stop and x is the speed of the car.