Posted by **Pedro** on Wednesday, March 7, 2007 at 4:59am.

the isotope caesium -137, which has a half life of 30 years, is a product of nuclear power plants. How long will it take for the amount of this isotope in a sample of caesium to decay to one sixteenth of its original amount? - explain answer

1/16 = 1/2^x

2^x = 16

Solve for x.

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