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. Suppose a person who is 4 ft from a hair dryer experiences a sound level of 60 dB. Find the proportionality constant and write the equation that expresses the inverse proportionality.
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. Suppose a person who is 4 ft from a hair dryer experiences a sound level of 60 dB. Find the proportionality constant and write the equation that expresses the inverse proportionality.
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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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. Suppose a person who is 4 ft from a hair dryer experiences a sound level of 60 dB. Find the proportionality constant and write the equation that expresses the inverse proportionality.
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