A) 100
B) \[{{10}^{-2}}\]
C) \[{{(69.3)}^{-1}}\]
D) \[0.693\times 69.3\]
Correct Answer: A
Solution :
Average life \[(\tau )=1.44\,\,\,{{t}_{1/2}}=1.44\times 69.3=99.7\] \[\approx 100\]minutes.
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