Costco is looking to expand their parking lot due to increased membership and the upcoming Christmas season. The current parking lot holds 500 spots in an area of 50,000 square feet, with the center of the store being 250 feet from the edge of the lot. A construction company can expand the radius of the lot by 2 feet per hour when the radius is 300 feet. At this rate of expansion, about 9 additional parking spots would be added to the lot within one hour.