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Kartavya Ramnani · Answer 1 · 2019-09-16T23:16:47+0000

The formula for the area of a circle is given as
$A= \pi r^2$ , where r is the radius of the circle. Using r for 13, and a truncated value of 3.14 for pi, we write
$A=3.14(13)^2=3.14(169)=530.66 \ ft^2$ . The actual proof for this formula involves a bit calculus, so for now, it's probably best to just memorize he formula.

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