Find the radius of this circle.
A = ar2
r = [?] ft
A = 9aft?

Answer:
A = [tex]\pi[/tex] . r^2
If A = 9[tex]\pi[/tex]ft^2
[tex]\pi[/tex] . r^2 = 9[tex]\pi[/tex]ft^2
r^2 = 9ft^2
r = sqrt(9ft^2)
r = 3ft ( r>0)
Step-by-step explanation: