Final answer:
First, find the total number of cups needed and apply a proportion to find the number of quarts.
Step-by-step explanation:
First, find the total number of cups she needs. If there are 3 cups in one batch, and she is making 5 batches, then she will need: 3x5=15 cups
Next, set up a proportion.
4 cups/1 quart=15 cups/x quarts