One of the lamp posts at a bank has a motion detector on it, and the equation(x +15) + (y - 12) = 25What is

One of the lamp posts at a bank has a motion detector on it, and the equation(x +15)² + (y - 12)² = 25What is the greatest distance, in feet, a person could be from the lamp and be detected?5 ft10 ft50 ft125 ft