A) 16989 years
B) 16858 years
C) 15675 years
D) 17700 years
Correct Answer: A
Solution :
\[\frac{N}{{{N}_{o}}}={{\left( \frac{1}{2} \right)}^{\frac{T}{{{t}_{1/2}}}}}\Rightarrow \frac{13}{100}={{\left( \frac{1}{2} \right)}^{\frac{T}{5770}}}\] Taking log \[\Rightarrow \log \frac{13}{100}=\frac{T}{5770}\log 1/2\Rightarrow 16989\,yrs\]You need to login to perform this action.
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