The sum of the ages of Jeremy and Kimberly is 64 years. 8 years ago, Jeremy's age was 2 times Kimberly's age. How old is Jeremy
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Not much can be done without knowing what 
is, but at the least we can set up the integral.
First parameterize the pieces of the contour:
where
and 
. You have
and so the work is given by the integral
First parameterize the pieces of the contour:
where
and so the work is given by the integral