Collin is making a bulletin board and note center. He is using square dry-erase tiles .One of every 3 squares will be a cork square .if he uses 12 squares for the note center how many will be cork square scalling is making a bulletin board and no and no Center he is using Square cork tiles and square dry erase one of every three squares will be a cork square if he uses 12 squares for the Sandra how many will be cork squares