A small amphitheater has 8 rows that have 42 seats in each row. If an act needs to keep the first row empty but has all the rest of the seats sold, then what expression can be used to find the total attendance? 8 × 40 + 8 × 2 8 × 40 – 8 × 2 7 × 40 + 7 × 2 7 × 40 – 7 × 2