Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Appendix A - Basic Algebra Review - A Exercises - Page A-14: 1


12 is: a natural number a whole number an integer a rational number a real number

Work Step by Step

RECALL: (i) Natural (or Counting) Numbers are $1, 2, 3, ...$ (ii) Whole Numbers are $0, 1, 2, 3, ...$ (ii) Integers are $..., -3, -2, -1, 0, 1, 2, 3, ...$ (iv) Rational Numbers are numbers that can be expressed as a quotient of two integers. (v) Irrational Numbers are numbers that cannot be expressed as a quotient of two integers. (vi) Real Numbers are the set of all rational and irrational numbers. Thus, the number 12 is a natural number, a whole number, an integer, a rational number, and a real number.
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