Answer:
48 batches
Explanation:
Conversions in the question:
1 quart = 4 cups
1 gallon = 4 quarts
Based on above:
1 gallon = 4 quarts = 16 cups
Converting gallons of milk to cups of milk:
Available milk = 3 gallons = 3 gallons * 16 cups/gallons = 48 cups
As each batch requires 1 cup of milk and 48 cups are available, the baker can make 48 batches of muffins, assuming there are no other limiting ingredients.