Question 1: The area of the square is the product of the two sides. 24 times 24 is 576. Thus, the square is 576 square inches.
Question 2: (Answer is based off info received from comments)
The area of a circle is 
 , where r is the radius. The diameter you have given me is 20 inches. The radius is half the diameter; thus, the radius is 10.
, where r is the radius. The diameter you have given me is 20 inches. The radius is half the diameter; thus, the radius is 10.



They want us to approximate the area. 
 is approximately 3.14. If we use this value, we get 314 square inches.
 is approximately 3.14. If we use this value, we get 314 square inches.