Final answer:
To find out how much fencing is needed to surround a square garden with an area of 64 square feet, you would find the square root of 64 to determine the length of one side of the garden (8 feet), then multiply that number by 4 (since a square has 4 sides), resulting in 32 feet.
Step-by-step explanation:
The area of a square is calculated by squaring one of its sides. In this case, the area of the garden is 64 square feet. This means that each side of the garden is 8 feet long (because the square root of 64 is 8).
To find out how much fencing is needed to enclose the garden, you need to add together the lengths of all four sides. Since each side is 8 feet long, the total length of the fencing you would need is 8 feet x 4 sides = 32 feet. Thus, the correct answer is (a) 32 feet.
Learn more about Area of a Square