IB Physics HL E 3 11 Activity Count Rate and Half Life Questions

The binding energy of the stable nuclide ${ }_{54}^{131} \mathrm{Xe}$ is 1.105 GeV .

The graph shows the variation with time of the activity of a pure sample of ${ }_{54}^{133} \mathrm{Xe}$.
$A / 10^{7} \mathrm{~Bq}$

Estimate the half-life of ${ }_{54}^{133} \mathrm{Xe}$.