This is the official print version of this OpenStax textbook. OpenStax makes full-color hardcover and B&W paperback print copies available for students who prefer a hardcopy textbook to go with the free digital version of this OpenStax title. The textbook content is exactly the same as the OpenStax digital book. This textbook is available for free download at the OpenStax dot org website, but as many students prefer to study with hardcopy books, we offer affordable OpenStax textbooks for sale through Amazon as well as most campus bookstores.