Section 12.1 Homework Hints Problems 1-2 These problems provide the main ideas for this section. Be sure you know the formula for permutations. Problems 3-30 Use the formula for permutations to answer these questions. See Examples 5, 6 and 9. Problems 31-40 These are distinguishable permutations. Use the formula for permutations to answer these questions. See Examples 13, 14, and 15. Problems 41-56 These applications, for the most part, are examples of permutations. Use the formula for permutations to answer these questions. See Examples 10 and 11. Note: Homework Hints are given only for the Level 1 and Level 2 problems. However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606. On the other hand, the problems designated "Problem Solving" generally require techniques that do not have textbook examples. There are many sources for homework help on the internet. Algebra.help Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources. http://www.algebrahelp.com/ Ask Dr. Math Dr. Math is a registered trademark. This is an excellent site at which you can search to see if your question has been previously asked, or you can send your question directly to Dr. Math to receive an answer. http://mathforum.org/dr/math/ Quick Math This site provides online graphing calculators. This is especially useful if you do not have your own calculator. http://www.quickmath.com/ The Math Forum @ Drexel This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column. http://mathforum.org/ Mathematics Home Page Access the Clemens and Alcuins Library of CSB/SJU and find one of the world's best collections of mathematical internet sites. http://library.csbsju.edu/rqs.phtml?subject_id=32