POLICE CAN ESTIMATE THE SPEED OF A VEHICLE BEFORE THE BRAKES ARE APPLIED USING THE FORMULA , WHERE S IS THE SPEED IN MILES PER HOUR AND D IS THE LENGTH OF THE VEHICLE’S SKID MARKS. WHAT WAS THE APPROXIMATE SPEED OF A VEHICLE THAT LEFT A SKID MARK MEASURING 125 FEET?

Question

anonymous · Answer

what formula.  you asked a similar question earlier.
something like .75d=s^2/2 maybe?

anonymous · Answer

using the formula 
$$e=mc^2$$?

anonymous · Answer

Formula = .75d=s squared/30.25

anonymous · Answer

$$\S^2=.75d(30.25)$$
Only need the positive root, so
$$\S= \sqrt{.75d(30.25)}$$

anonymous · Answer

what did you get as the final answer 22.7d

anonymous · Answer

They gave you d=125

anonymous · Answer

I got 2835.9

anonymous · Answer

it says round to the nearest mile per hour

anonymous · Answer

o and square root it

anonymous · Answer

Take the square root of that

anonymous · Answer

53.25

anonymous · Answer

to the nearest mph, it's 53 mph