SOLUTION: How much will it cost to fence a circular swimming pool at the edge of the pool if it has a diameter of 35 feet and fencing costs $12.50 per foot (use = 3.14)?

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Question 948837: How much will it cost to fence a circular swimming pool at the edge of the pool if it has a diameter of 35 feet and fencing costs $12.50 per foot (use = 3.14)?
Answer by MathLover1(20850) About Me  (Show Source):
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a circular swimming pool at the edge of the pool is equal to perimeter of a circle
P=2r%2Api
if it has a diameter of d=35ft then radius is r=d%2F2 => r=35ft%2F2=> r=17.5ft
find perimeter:
P=2%2A17.5ft%2A3.14
P=109.9ft
and if fencing costs $12.50 per foot, then
cost=109.9cross%28ft%29%2A12.50%281%2Fcross%28ft%29%29
cost=109.9%2A12.50
cost=1362.5