SOLUTION: My teacher gave us this word problem , please help ! "A police accident investigatore can use the formula s=2√5l to estimate the speed s of a car in miles per hour based o

Algebra ->  Rational-functions -> SOLUTION: My teacher gave us this word problem , please help ! "A police accident investigatore can use the formula s=2√5l to estimate the speed s of a car in miles per hour based o      Log On


   

Question 259038: My teacher gave us this word problem , please help !
"A police accident investigatore can use the formula s=2√5l 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 the car traveling that left the skid marks 50 feet long?
PLEASE HELP ME =/
Found 2 solutions by drk, Earlsdon:
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
We have the following formula:
s=2sqrt%285L%29
where L is given as 50.
--
step 1 - replace L with 50 to get
s=2sqrt%285%2A50%29
we can find s as about
s ~ 31.6227 miles / hr.

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
S+=+2%2Asqrt%285%2AL%29 Substitute L = 50.
S+=+2%2Asqrt%285%2A50%29
S+=+2%2Asqrt%28250%29 Evaluate.
S+=+2%2A%2815.811%29
S+=+31.622mph.