The loudness, L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d, from the source of the sound. For a person 7 feet from a sound source, suppose the loudness is 85 decibels. How loud is the sound source when the person is 46 feet away? (Round your answer to two decimal places if necessary).

The loudness, L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d, from the source of the sound. For a person 7 feet from a sound source, suppose the loudness is 85 decibels. How loud is the sound source when the person is 46 feet away? (Round your answer to two decimal places if necessary).

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter8: Rational Expressions And Equations

Section8.9: Use Direct And Inverse Variation

Problem 501E: The force needed to break a board varies inversely with its length. If Tom uses 20 pounds of...

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