SOLUTION: Hello The formula R=2sqrt5L can be used to approxamate the speed R in meters per hour, of a car that has left skid marks of the lenght L in feet, how far will a car skid at 20 mp

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Hello The formula R=2sqrt5L can be used to approxamate the speed R in meters per hour, of a car that has left skid marks of the lenght L in feet, how far will a car skid at 20 mp      Log On


   

Question 330338: Hello
The formula R=2sqrt5L can be used to approxamate the speed R in meters per hour, of a car that has left skid marks of the lenght L in feet, how far will a car skid at 20 mph.
The car will skid ? feet
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The formula R=2sqrt5L can be used to approximate the speed R in miles per hour,
of a car that has left skid marks of the length L in feet,
how far will a car skid at 20 mph.
The car will skid ? feet
:
R=2%2Asqrt%285L%29
:
2%2Asqrt%285L%29 = 20
;
sqrt%285L%29 = 20%2F2
:
sqrt%285L%29 = 10
square both sides
5L = 100
L = 100%2F5
L = 20 feet at 20 mph