11. A dog is tied with a rope to a stake in the ground. The length of the rope is 5 yards. What is the area, in square yards, in which the dog can roam? 1) 257 2) 107 3) 25 4) 20

8. Enclosing a Field You have 16 miles of fence that you will use to enclose a rectangular field. a. Draw a picture to show that you can arrange the 16 miles of fence into a rectangle of width 3 miles and length 5 miles. What is the area this rectangle? b. Draw a picture to show that you can arrange the 16 miles of fence into a rectangle of width 2 miles and length 6 miles. What is the area this rectangle? c. The first two parts of this exercise are designed to show you that you can get different areas for rectangles of the same perimeter, 16 miles. In general, if you arrange the 16 miles of fence into a rectangle of width w miles, then it will enclose an area of A = w(8 – w) square miles. i. Make a graph of the area enclosed as a function of w, and explain what the graph is showing.

4. What is the area of a square chessboard whose perimeter is 52 cm? The area of the square chessboard is 26 cm². The area of the square chessboard is 104 cm². The area of the square chessboard is 169 cm². The area of the square chessboard is 2,704 cm².

86) The front of a barnyard has the following dimensions on one of its sides. Find the area of this side of the barn. 18 feet 18 feet 40 feet (a) 1228.7 ft? (b) 1737.9 ft (c) 1891.4 ft² (d) 1925 ft² (e) 2011.3 ft² 109