ALGEBRA+TRIGONOMETRY-MYLAB MATH W/ETEXT
7th Edition
ISBN: 9780137394050
Author: Blitzer
Publisher: PEARSON
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Chapter 3, Problem 80RE
The loudness of a stereo speaker, measured in decibels, varies inversely as the square of your distance from the speaker When you are 8 feet from the speaker, the loudness 28 decibels, What is the loudness when you are 4 feet free the speaker?
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