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28 May, 14:05

As a result of the installation of a muffler, the noise level of an engine was reduced from 89 to 72 decibels. Find the percent decrease in the intensity level of the noise due to the installation of the muffler. (Round your answer to the nearest whole number

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  1. 28 May, 16:12
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    Step-by-step explanation:

    Using the formula

    Initial - final/initial = %/100

    89-72/89 = %/100

    17/89 = %/100

    Making %subject of the formula

    % = 17*100/89

    So % = 1700/89

    % = 19.101

    Therefore rounding off the answer we have

    X=19%
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Home » Mathematics » As a result of the installation of a muffler, the noise level of an engine was reduced from 89 to 72 decibels. Find the percent decrease in the intensity level of the noise due to the installation of the muffler.
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