The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days?
- \( \frac{1}{16} \)
- \( \frac{1}{4} \)
- \( \frac{1}{2} \)
-
\( \frac{15}{16} \)
The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days?