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Mathematics Trouble in Chem Section [Logs, Ln, E]

Discussion in 'DAT Discussions' started by DrTacoElf, Apr 28, 2004.

  1. DrTacoElf

    Dentist 10+ Year Member

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    Hey guys i'm not the greatest at number manipulation. Came across a problem the other day where i ended up with e^(-3/2) the kaplan book just says this is .22, well thats useless to me without a calculator. How does one go about approximating this i'm cluless :scared:
     
  2. sxr71

    sxr71 Senior Member
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    It will not be on the real DAT.
     
  3. DrTacoElf

    Dentist 10+ Year Member

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    Are you sure, this is very common in radioactive decay problems

    A=Aoe^-yt
     
  4. blankguy

    7+ Year Member

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    You mean

    time of half-life=.693/k?

    Check this pdf file on reaction rates and half-life clickHere
     
  5. sxr71

    sxr71 Senior Member
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    All the half-life questions on the DAT can be done by counting on your fingers. I'm not kidding.
     

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