Problema Solution
The formula r= 2sqrt5L can be used to approximate the speed r, in miles per hous, of a car that has left skid marks on lenght L, in feet. How far will a car skid at 70 mph?
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r=2sqrt5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70 mph?
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70 = 2sqrt5L
/2
35=sqrt5L
square both sides
35^2= 5L
35^2/5 = L
L = 245 feet