Vivian flies a drone in a circular path around an object that is 180 feet south and 180 feet west of her position. The drone's path takes it over a point that is 250 feet north and 230 feet east of her. Find an equation for the drone's path. (Assume Vivian is located at the origin, with the horizontal axis running east-west and the vertical axis running north-south) The drone's path follows the equation