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    jopielr's Avatar
    jopielr Posts: 1, Reputation: 1
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    #1

    Jun 15, 2011, 06:40 AM
    5=log(1000+Q) calculate Q
    5=log(1000+Q) calculate Q?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jun 15, 2011, 07:32 AM

    Apply the definition of the logarithm: If



    then



    For this problem you have (assuming the log is base 10):



    so



    I'm sure you can take it from here.
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