Axia College Material
Week 6 Application Assignment
Radicals
Application Practice
Answer the following questions. Use Equation Editor to write mathematical expressions and equations.
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1.
After an accident, police can determine the speed at which the car had been traveling based on
the length of the skid marks the car left on the road. The police use the following formula:
(
29
1
2
2
5
r
L

=
, where r is the speed of the car, in miles per hour, and L is the distance of the skid
marks, in feet.
a.
Solve the equation
(
29
1
2
2
5
r
L

=
for L.
Answer Box (Type your work and answer below)
Apply the rule of negative and fractional exponents before solving for the variable L.
20
4
5
2
5
2
5
5
2
2
2
2
2
1
2
1
r
L
r
L
r
L
r
L
L
r
=
=
=
=
=
=
=
=
⋅
=
b.
How far will a car skid at 65 mph? Round your answer to the nearest whole feet, if
necessary.
Answer Box (Type your work and answer below)
Use your equation in 1a and replace the known values in the equation.
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 Winter '10
 JhoneCaine
 Imperial units, Axia College Material, Type your work

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