Answer:
A) Replace L with the length of the skid mark:
Speed = √(20(208))
Speed= √(4160)
Speed = 64.5 miles per hour
B) set the equation to the speed and solve for L:
47 = sqrt(20L)
Square both sides:
2209 = 20L
Divide both sides by 20:
L = 110.5 feet
