Top, bottom refers to the vertical strips.
Step 1: Find the x-values for the points of intersection.
Step 2: Draw the vertical strips.
Step 3a: Ask yourself if the top of every strip is coming from the same function?
Step 3b: Ask yourself if the bottom of every strip is coming from the same function?
Step 4: Try to setup the integral.
If you need any help then post back.
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