Madison planted grass in a rectangular section of her yard. The section she planted is 50 feet long and 45 feet wide, giving it a total area of 2250 square feet. Within this section, there is a concrete grill stand measuring 3 feet by 4 feet, which takes up 12 square feet. Additionally, there is a padded circular tetherball court with a diameter of 20 feet, which has an area of approximately 314 square feet.
To find the approximate area planted with grass, we subtract the areas of the grill stand and the tetherball court from the total area of the rectangular section. Therefore, the calculation is: 2250 square feet - 12 square feet - 314 square feet, resulting in an approximate area of 1924 square feet. This represents the portion of the rectangular section that Madison planted with grass.