Answer:
Part A: 4 cups
Part B: 5 fluid ounces
Explanation:
Part A: Since the ratio of vinegar to water is 1:16, 1 cup of vinegar is 16 cups of water. Divide both by 4 to get 1/4 cups of vinegar to 4 cups of water.
PartB: Since we have 80 fluid ounces of water, and 16 is 16 times 1, 80/16 is 5 fluid ounces.