March 29, 2024, 05:19:11 AM
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Topic: How long does a radioactive material take to decay to 2% of its original?  (Read 674 times)

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Offline Judy

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Assuming that the half-life of a radioactive element is 5.2 years, how long does it take when this radioactive material decays to 2% of its original amount?
 
The answer is  B (see attachtment)

Here's my calculation:
log(2/100) / log(1/2) *5.2
None of the answer leads to this.

Online Borek

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Not sure what the problem is, B and you answer seem to be equivalent.
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