Final answer:
Lorenzo used 2 cups of lemonade.
Step-by-step explanation:
To find out how many cups of lemonade Lorenzo used, we need to compare the amount Adele used. It is given that Lorenzo used 4 times as much lemonade as Adele. If Adele used 1/2 of a cup of lemonade, then Lorenzo used:
Lorenzo's lemonade = 4 * Adele's lemonade
Lorenzo's lemonade = 4 * 1/2
Lorenzo's lemonade = 2 cups
So, Lorenzo used 2 cups of lemonade.