Question

at an accident scene, a police officer may determine the rate of speed, r, in miles per hour of the car by using the following fromula r= radical symbol 20l, where l is the length of the skid marks. How fast was a car going if the skid marks at the scene are 180 feet long?

Answer 1

\[r = \sqrt{20L}\]
r = sqrt(20x180)
r = sqrt(3600)
r = 60 mph

Answer 2

thanks