Alex is baking cookies and the recipe calls for 3 cups 6 oz of milk. If he decides to double the recipe, how much milk will he need?

If you double the recipe you are doubling the ingredients. So you need to do 3 times 2 and 6 times 2.

3x2=6 (cups)

6x2=12 (oz)

So the official answer is:

If you double the recipe you will need 6 cups and 12 oz of milk.

I think he would need 6 cups of 6 oz of milk