Question 1177948
{{{A = 1386}}} square centimeters and {{{pie = 22/7}}}, find {{{r}}}. 

{{{A =pi*r^2}}}

{{{r^2=A/pi}}}

{{{r^2=1386/(22/7)}}}

{{{r^2=(7*1386)/22}}}

{{{r^2=441}}}

{{{r=sqrt(441)}}}

{{{r=21}}}