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

[DrTacoElf]

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

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[sxr71]

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

It will not be on the real DAT.

 

[DrTacoElf]

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

A=Aoe^-yt

 

[blankguy]

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

A=Aoe^-yt

You mean

time of half-life=.693/k?

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

 

[sxr71]

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