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Exponential problem with E. coli

  1. Mar 23, 2006 #1
    20 The number of parts per million, x, of E. coli in a stream t hours after a pollutant containing E. coli is introduced is modelled by
    x(t) = loge (t + e2), t ≥ 0.
    a How many parts per million of E. coli are introduced into the stream?
    how do i work out this question?
     
  2. jcsd
  3. Mar 23, 2006 #2

    George Jones

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    At what time t does the introduction of E coli take place?

    Regards,
    George
     
  4. Mar 23, 2006 #3

    Hootenanny

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    I'm assuming you know the laws of logs? How far have you worked through the problem?
     
  5. Mar 23, 2006 #4
    thank you . ...
     
  6. Mar 23, 2006 #5
    i let t=0 therefore loge e2 equals to 2 is it correct?
     
  7. Mar 23, 2006 #6
    2 ppm, yes. Nice work!

    Regards,

    Rich B.
     
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