A library has 12,500 fiction books and 19,000 nonfiction books. Currently 2/5 of the fiction books and 2/5 of the nonfiction books are checked out. Of the books checked out, 1/10 are due back this week. How many books are due this week?

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?