SOLUTION: The police use the formula v = 4.9 √L to estimate the speed of a car v based on the length L of its skid marks on dry pavement. a.) What is a reasonable estimate for a car's

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Question 178933: The police use the formula v = 4.9 √L to estimate the speed of a car v based on the length L of its skid marks on dry pavement.
a.) What is a reasonable estimate for a car's speed if its skid marks measure 220 feet?
b.) What would be the length of your skid marks if you drove with the speed of 65 mph?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
v=4.9sqrt%28L%29
:
a)v%28220%29=4.9sqrt%28220%29=4.9%2814.83%29=highlight%2872.68%29mph
:
b)65=4.9sqrt%28L%29
:
13.265=sqrt%28L%29
:
highlight%28L=175.96%29feet