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Homework Help: How do I solve this?

  1. Sep 30, 2009 #1
    1. The problem statement, all variables and given/known data

    9.0 = 34.2(1 - e-t/2.7)

    Solve for t

    2. The attempt at a solution

    .263158 = (1 - e-t/2.7)

    What is e?
  2. jcsd
  3. Sep 30, 2009 #2


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    Homework Helper

    e-t/2.7 = 1 - 0.263158
    Take ln. on both side. Note that ln(e) = 1. Solve for t.
  4. Sep 30, 2009 #3


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    Gold Member

    e is an extremely useful mathematical constant. Are you familiar with logarithms (specifically natural logarithms)?

    Edit- I guess my simple question isn't very helpful when someone gives away the answer right before me...
    Last edited: Sep 30, 2009
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