Final answer:
To find the total length of the fabric Amanda used, multiply the length of each roll by the number of rolls. Convert inches to yards by dividing by 36.
Step-by-step explanation:
To find the total length of the fabric Amanda used, we need to multiply the length of each roll by the number of rolls she used. Each roll has 399.6 inches of fabric, so we multiply that by 2 (the number of rolls). 399.6 inches x 2 = 799.2 inches.
Since the question asks for the answer in yards, we need to convert inches to yards. There are 36 inches in a yard, so we divide 799.2 inches by 36. 799.2 inches ÷ 36 = 22.2 yards.
Therefore, the total length of fabric Amanda used is 22.2 yards (option a).