SOLUTION: A certain radioactive isotope decays at a rate of 0.1% annually. Determine the half-life of this isotope, to the nearest year.

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Question 622773: A certain radioactive isotope decays at a rate of 0.1% annually. Determine the half-life of this isotope, to the nearest year.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A certain radioactive isotope decays at a rate of 0.1% annually.  

Determine the half-life of this isotope, to the nearest year.

 I+=+I%5B0%5De%5E%28-.001%2At%29

 +1%2F2+=+e%5E%28-.001%2At%29

 ln(.5) = -.001*ln e^t

 ln(.5)/-.001 = t