Question

please send the solution​

Answer 1

answer c) I hope this answer helpful \[A={{A}_{0}}{{\left( \frac{1}{2} \right)}^{\frac{t}{{{T}_{1/2}}}}}\]Þ\[100=1600\,{{\left( \frac{1}{2} \right)}^{\frac{8}{{{T}_{1/2}}}}}\]Þ \[{{T}_{1/2}}=2sec\] Again at t = 6 sec, \[A=1600\,{{\left( \frac{1}{2} \right)}^{\frac{6}{2}}}=200\]counts/sec