SOLUTION: Aaron is building a circular spa for a client. He will place tile around the rim. The outer radius is 8.5 feet and the inner radius is 8 feet. How many square feet of t

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Question 1154116: Aaron is building a circular spa for a client. He will place tile around the
rim. The outer radius is 8.5 feet and the inner radius is 8 feet.
How many square feet of tile will he need? (Use 3.14 to approximate PI)(Round
your answer to the nearest tenth.)
If the tile costs $2.50 per square foot, how much will it cost? (Round your
answer to the nearest tenth.)

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The area of the outer circle is:
+A%5B1%5D+=+3.14%2A8.5%5E2+
The area of the inner circle is:
+A%5B2%5D+=+3.14%2A8%5E2+
+A%5B1%5D+-+A%5B2%5D+=+3.14%2A%28+8.5%5E2+-+8%5E2+%29+
+A%5B1%5D+-+A%5B2%5D+=+3.14%2A%28+72.25+-+64+%29+
++A%5B1%5D+-+A%5B2%5D+=+3.14%2A8.25+
++A%5B1%5D+-+A%5B2%5D+=+25.905+
25.905 square ft are needed
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+25.905%2A2.5+=+64.7625+
$64.76 is the cost for the tile