Final answer:
The radius of a circle with an area of 121π square feet is 11 feet.
Step-by-step explanation:
To find the radius of a circle with an area of 121π square feet, we can use the formula for the area of a circle, which is A = πr². We know that the area is 121π, so we can write the equation as 121π = πr². If we divide both sides by π, we get 121 = r². Taking the square root of both sides, we find that the radius is √121 = 11 feet.