1) The distance D in feet it takes a car travelling at x mph to come to a full stop after hitting the brakes is given by D=1.26x^2 + 0.075x. Estimate the stopping distance for a car travelling at 40mph.

2) During the first seconds, the height h in feet of a baseball after t seconds is given by h = -16t^2 + 97t + 3.8 Estimate the height of the ball after 4 seconds.

3) The average weight W (in ounces) of a fish caught in a certain lake is given by W = 0.001x^3 + 0.03x^2 + 1.2 where x is the lenght in inches. Estimate the weight of a fish from the lake that is 14 inches long.