Math120

Social Security is the largest source of income for elderly Americans. It is projected that in about 30 years, however, there will be twice as many older Americans as there are today, and the excess revenues now accumulating in Social Security’s trust funds will be exhausted. (Source: Social Security Administration. ) To supplement their retirement incomes, more and more Americans have begun investing in mutual funds, pension plans, and other means of savings. In Section 1. 3, we relate the concepts of this chapter to the percent of U. S. households investing in mutual funds. 1 1. 1 Basic Concepts 1. 2 Operations on Real Numbers 1. 3 Exponents, Roots, and Order of Operations 1. 4 Properties of Real Numbers 11Review of the Real Number System Copyright © 2005 Pearson Education, Inc. , publishing as Pearson Addison-Wesley