Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 11 - Rational Expressions and Functions - 11-7 Graphing Rational Functions - Practice and Problem-Solving Exercises - Page 699: 44

Answer

a) Please see the graph. b) 10 miles: $s=100$, 1 mile: $s=1600$, .1 mile: $s=16000$ c) The closer a radio is to a transmitter, the stronger the frequency. Since you are closer to one transmitter than to the other, then the weaker frequency would be muffled by the stronger frequency.
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Work Step by Step

a) $d \geq 40$ when $s \leq 1$ b) $s=1600/d^2$ $s = 1600/10^2$ $s=1600/100$ $s=160$ $s=1600/d^2$ $s=1600/1^2$ $s=1600/1$ $s=1600$ $s=1600/d^2$ $s=1600/.1^2$ $s=1600/.01$ $s=16000$
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