At long last we've posted solutions for another Chapter! Between having the Olympics here in Vancouver, and then leading a group of students to El Salvador during Spring Break to help build a house with Habitat for Humanity, it's been hard to find time to post solutions. In order to speed up the release of different chapters, I'm posting only selected problems from the sections we're covering in my classes. Chapters 19 to 21 will be the next chapters we cover, then we'll do chapters 2 to 4, and then we'll look at the results of the Chapter Survey to see which ones should be covered next. We'll focus on the even numbered questions at first and then after the popular chapters are finished, go back and fill in some of the gaps.