Which equation represents a circle with a center at (2, –8) and a radius of 11?

The equation of a circle is defined by:  (x - h)² + (y - k)² = r²  where
(h,k) represents the center of your circle and r = the radius

So (x - 2)² + (y + 8)² = 121 is your equation

Answer: r=4.5  feetexplanation: radius  r  is half of the diameter  d,⇒r=d2=92=4.5  feetidk i could be wrong