math
posted by Summer .
A vehicle leaves a skid mark of 40 ft before stopping. What has the approximate speed of the vehicle before it stopped?
(the formula is speed=.7 times length, then find the square root times 5.5)
Is is 2535 mph?

40 x .7 = 28
sq root of 28 is 5.291502622
multipy that by 5.5 = 29.10326442mph