Answer:
r = 3ft so the ? = 3
Step-by-step explanation:
We know that the area of a circle is equal to π[tex]r^{2}[/tex] where r is the radius of the circle. Therefore we just have to solve the following equation...
π[tex]r^{2}[/tex] = 9π[tex]ft^{2}[/tex]
[tex]r^{2} = 9ft^{2} \\r = 3ft[/tex]
