Have you ever seen pictures of the Mayan calendar stones or any unusual types of calendars? Have you ever wondered why the calendar we use has 12 months, with either 30 or 31 days (except February)? In this chapter's first Internet project, you will research calendars and then design your own calendar.

In this chapter you will learn: how to simplify expressions with exponents how to simplify fractions how to write and calculate in scientific notation how to solve problems by accounting for all possibilities