There are 30 books on the library shelf, Sam noted that 1/6 of them are non fiction. Dan notes that 3/5 of the books are fiction
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Each curve completes one loop over the interval 
. Find the intersections of the curves within this interval.
The region of interest has an area given by the double integral
equivalent to the single integral
which evaluates to
.
The region of interest has an area given by the double integral
equivalent to the single integral
which evaluates to