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The loudness level of a sound can be expressed by intensity of a sound barely...

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Algebra

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The loudness level of a sound can be expressed by intensity of a sound barely audible to the human ear The formula D 10 log 1 logo describes the loudness level of a sound D in decibels where I is the intensity of the sounc in watts per meter and I is the intensity of a sound barely audible to the human ear Use this information to answer parts a and b below a Express the formula so that the expression in parentheses is written as a single logarithm Choose your answer below OA C D log 170 0 8 D 10 log B D 10 log 11 OD D 10 log 1 0 b Use the form of the formula from part a to answer this question If a sound has an intensity 1 100th of the intensity of a louder sound how much smaller on the decibel scale is the loudness level of the less intense sound decibels softer

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