[Question]: There are 35 books on the cart. There are five fiction books, 4 more non-fiction books than fiction books, 2 times as many autobiographies as fiction books, and the rest picture books. How many books were picture books?
[Answer]: There are 5 + 4 = 9 non - fiction books on the cart. There are 2 * 5 = 10 autobiographies on the cart. There are 5 + 9 + 10 = 24 fiction, non - fiction, and autobiography books on the cart. There are 35 - 24 = 11 picture books on the cart.
So the answer is 11.

[Question]: Building A has 4 floors, which is 9 less than Building B. Building C has six less than five times as many floors as Building B. How many floors does Building C have?
[Answer]: A = 4 floors. B = 4 + 9 = 13 floors. C = (13 * 5) - 6 = 59 floors. Building C has 59 floors.
So the answer is 59.

[Question]: James paints a 20 ft by 15 ft mural. It takes him 20 minutes to paint 1 square foot and he charges $150 per hour. How much does he charge to paint the mural?
[Answer]:
The mural is 20 * 15 = 300 square feet. So it takes him 300 * 20 = 6000 minutes. So he paints it in 6000 / 60 = 100 hours. That means he charges 100 * 150 = $15000.
So the answer is 15000.