Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.1 - Real Numbers - 1.1 Exercises - Page 12: 86

Answer

Sunday:$-9,9$ Monday:$-3,3$ Tuesday: $0,0$ Wednesday: $5,5$ Thursday: $9,9$ Friday: $1,1$ Saturday: $-1,1$ $T_o - T_G $ gives more information

Work Step by Step

During Sunday: $$T_o - T_G = 68-77 = -9 F^{\circ}\\ |T_o-T_G| = 9^{\circ}$$ During Monday: $$T_o - T_G = 72-75 = 3 F^{\circ}\\ |T_o-T_G| =3^{\circ}$$ During Tuesday: $$T_o - T_G = 74-74 = 0 F^{\circ}\\ |T_o-T_G| = 0^{\circ}$$ During Wednesday: $$T_o - T_G = 80-75 = 5 F^{\circ}\\ |T_o-T_G| =5^{\circ}$$ During Thursday: $$T_o - T_G =77-68 = 9 F^{\circ}\\ |T_o-T_G| = 9 ^{\circ}$$ During Friday: $$T_o - T_G =71-70 =1 F^{\circ}\\ |T_o-T_G| = 1 ^{\circ}$$ During Saturday: $$T_o - T_G =70-71 = -1 F^{\circ}\\ |T_o-T_G| = 1 ^{\circ}$$ $T_o - T_G $ gives more information as it indicates which city has the higher temperature.
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