Final answer:
The 64 fl oz bottle for $4.48 is the better buy with a lower price per fluid ounce.
Step-by-step explanation:
To determine which bottle of apple juice is the better buy, we need to compare the price per fluid ounce for each bottle. The first bottle is 48 fl oz for $3.84, so the price per ounce is $3.84/48 = $0.08/oz.
The second bottle is 64 fl oz for $4.48, so the price per ounce is $4.48/64 = $0.07/oz.
Therefore, the second bottle, 64 fl oz for $4.48, is the better buy as it has a lower price per fluid ounce.