math

solve for the unknown:

6e^(-4t) = 2

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  1. 6*e^(-4t) = 2
    e^(-4t) = 1/3
    take the ln of both sides:
    ln [ e^(-4t) ] = ln (1/3)
    -4t = ln (1/3)
    t = -(1/4)*(ln (1/3)) or
    t = (1/4)*(ln 3)

    hope this helps~ :)

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