Question 204070
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{{{Area[C]=(pi)r^2}}}


We can find the radius since the circumference is given.


{{{Circumference=2(pi)r}}}
{{{42(pi)ft=2(pi)r}}} ---> {{{cross(42)21*cross(pi)/(cross(2)*cross(pi))=cross(2)*cross(pi)r/(cross(2)*cross(pi))}}}
{{{red(r=21ft)}}}


Therefore,
{{{A[C]=(pi)(21)^2}}}
{{{red(A[C]=(pi)441ft^2)}}}, (Answer)


Thank you,
Jojo</font>