The Formula $s = k \sqrt { d }$ Relates the Speed

Multiple Choice

The formula $s = k \sqrt { d }$ relates the speed $s$ (in mph) of a car and the distance $d$ of the skid when a driver hits the brakes. On wet pavement, $k = 3.24$ . How far will a car skid if it is going 51 mph?

A) about 225 ft
B) about 282 ft
C) about 248 ft
D) about 203 ft
E) about 236 ft