Chapter R - Review of Basic Concepts - R.2 Real Numbers and Their Properties - R.2 Exercises - Page 21: 100

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RECALL: The absolute value of a number $a$ is defined as: $|a| = a$ if $a \ge 0$ $|a| = -a$ if $a \lt 0$ Thus, $|-8| =-(-8) = 8$ Note that $8$ is bigger than 0. Therefore, $|-8| \ge 0$ The statement is true.