Question

the formula can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length l in ft how far will the car skid at 70mph ?

Answer 1

\[2\sqrt{5l}\]

Answer 2

that is the formula

Answer 3

\[(70)^2=(2\sqrt{5l})^2\]\[4.900=4*5l\]\[20l=4.900\]\[l=\frac{4.900}{20}\]\[l=245\]