Question

LAW ENFORCEMENT:  A police accident investigator can use the formula S25L to estimate the speed s of a car in miles per hour based on the length l in feet of the skid marks it left.  How fast was a car traveling that left skid marks 105 feet long?

Answer 1

PLEASE HELP

Answer 2

So is the formula:
S = 25L

Answer 3

It's s=2sqrt5l @calculusxy

Answer 4

\[S = 2\sqrt{5l}\]

Answer 5

Is that correct?

Answer 6

Yes @calculusky

Answer 7

Okay!

Answer 8

You know that the skid mark left is 105 feet, and you can replace that for L. Thus, what you have here is now:

\[S = 2\sqrt{5(105)}\]

Answer 9

Did you solve for it?

Answer 10

I got 2sqrt525 @calculusxy

Answer 11

I'm not good at solving square roots

Answer 12

Please help I need this now :( @calculusxy

Answer 13

About 45.8