A scoring system is used to assess your mastery of this topic.

• A record of your activity is maintained during your session. The following items are reported: problems attempted, problems completed correctly on the first attempt, total points, and average points per problem.


• After each problem, you will have the option to end the movie and print out a report of your activity.


• Do not use the browser navigation buttons while working in this movie. If you navigate away from this movie, the record of your activity will be lost.