Answer: It would cost $43.68.
Step-by-step explanation:
To find the cost per pound of apples, we can divide 28.60 by 5.5, and we get 5.2.
To find the cost for 8.4 pounds of apples, multiply 8.4 by 5.2, which is 43.68. Therefore it would cost $43.68 to purchase 8.4 pounds of apples.