Marcy is making cookies. For each batch of dough, she needs

2/3
cup of sugar.
How much sugar will she use if she makes 6 batches of cookies

If Marcy needs 2/3 cup of sugar for each batch of cookies, then for 6 batches of cookies, she will need:

6 x 2/3 = 4 cups of sugar

Therefore, Marcy will need 4 cups of sugar if she makes 6 batches of cookies.