500
Mrs. Savage is painting all 4 of her bathroom walls. She has enough paint to cover 100ft2 of wall. Her ceiling is 10ft tall, and each wall is 4 feet long. Will she have enough paint to cover all 4 walls?
No, each wall is (10x4) 40ft2, and there are four of them, so the total space is (40x4) 160ft2, which is more than 100.