Geometry
posted by Shaniqua .
Lobster fishers in Maine often use spherical buoys to mark their lobster traps. Every year the buoys must be repainted. An average buoy has a 12 inch diameter, and an average fisher has about 500 buoys. A quart of marine paint covers 175 ft squared. How many quarts of paint does an average fisher need each year?

Let's change the inches to feet.
SA = 4 * 3.14 * 0.5^2
SA = 6.28 sq. feet
(500 * 6.28)/175 = 17.94 = 18 quarts 
area of 1 buoy: pi d^2 = 144pi
so, quarts of paint:
q = 144pi * 500 / 175 
oops  Go with Ms Sue  I forgot to change inches to feet.

And I forgot to square the radius.
SA = 4 * 3.14 * 0.5^2
SA = 3.14 square feet
(500 * 3.14)/175 = 8.97 = 9 quarts 
Thanks!

You're welcome. Sorry about the mixup.
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