Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 9 - Basic Algebra - 9.1 Signed Numbers - 9.1 Exercises - Page 631: 56


(a) patient A could think their score was above normal when in fact it is below normal and they need to see a doctor (b) Patient D

Work Step by Step

(a) This mistake might happen because without the negative sign patient A's score falls within the above normal range rather than the below normal range. (b) The sign of patient D's score makes no difference because it is zero.
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