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. How far will a car skid if it is going 48 mph on dry pavement? On dry pavement, $k = 5.34$ .

A) about 59 ft
B) about 76 ft
C) about 99 ft
D) about 81 ft
E) about 70 ft