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    greengiant196's Avatar
    greengiant196 Posts: 1, Reputation: 1
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    #1

    Jan 3, 2009, 04:48 AM
    rearranging equations
    Can someone please help me rearrange this formula to find t.



    0.4=1.2(1-e^(-t/2) )
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Jan 4, 2009, 11:59 AM


    Multiply both sides by 5/6.



    Subtract 1 from both sides:



    Now, take ln of both sides and finish up?
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