algebra

Use log 3=0.477 and log 5=0.699 to evaluate the logarithm.
log45

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  1. 45 = 3 * 3 * 5

    log(45) = 2 log(3) + log(5)

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  2. 45 = 3 * 3 *5
    so
    log 45 = log (3*3*5)
    and we all know
    log (a*b*c) = log a + log b + log c

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    Damon

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