Your enclosing a circular flower garden with a fence that costs $2.99 per foot. the radius of the garden is 7 feet. how much will it cost to buy the fence?

  $ 131.45 (not including sales tax) .
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Explanation:
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      C =  2 ;
 
         in which: C = circumference of circle;
                        r = radius = 7 ft.
                         = 3.14 ;
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                C = 2 * (7 ft) * (3.14) = (14 ft) * (3.14)  =  43.96 ft.
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   $ 2.99 / ft * (43.96 ft) = $ 131.4404 .
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The answer would be choice b