15. When a car accident occurs on a dry tar road, police use the function S = 1300 to estimate the speed, S, in miles per hour that the car was traveling based on
the distance the car skidded, d, in feet.
a. Solve this equation for d.
b. Using your equation from part (a), determine the length of a skid mark left by
a car traveling at 56 mph.
c. Why would the police prefer to have the function written in the form
S= = 130d, rather than in the form you wrote for part (a)?