The fountain at the park has a walkway around it that is 1 foot wide. The fountain has a radius of 8 feet. The radius of the fou
ntain and walkway together is . The area in terms of pi of the fountain and the walkway together is π ft2. The approximate value for the area of just the walkway to the nearest whole number is
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Parameterize by
with and
.
Then the surface element is
and the surface integral is