Question 1142671
{{{ C = 2pi*r }}}
{{{ C = 7pi }}}
{{{ 2pi*r = 7pi }}}
{{{ 2r = 7 }}}
{{{ r = 7/2 }}}
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{{{ A = 4pi*r^2 }}}
{{{ A = 4pi*(7/2)^2 }}}
{{{ A = 49pi }}}
get a 2nd opinion if needed