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OpenStudy (anonymous):
The formula r=2√5L can be used to approximate the speed r, in MPH of a car that left skid marks of length L, in feet. How far will a car skid at 20 mph?
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OpenStudy (anonymous):
what you do is set r to be 20 like so, \[20=2\sqrt{5L}\] and solve for L
OpenStudy (anonymous):
Got it. The answer is 20 :)
OpenStudy (anonymous):
you got it
OpenStudy (anonymous):
if you read the problem r = the speed of the car
OpenStudy (anonymous):
no, not 75 feet
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OpenStudy (anonymous):
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