College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 2, Functions - Section 2.1 - Functions - 2.1 Exercises - Page 193: 80


(a) $S(2)=16\pi \approx 50.27$ $S(3)=36\pi \approx 113.10$ (b) surface areas

Work Step by Step

(a) We are given: $S(r)=4\pi r^2$ $S(2)=4\pi (2)^2=16\pi \approx 50.27$ $S(3)=4\pi (3)^2=36\pi \approx 113.10$ (b) The values in (a) represent the surface areas of a sphere of radius $2$ and $3$ units, respectively..
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