A radioactive sample contains \( 10^{6} \) radioactive nuclei. Its half life is \( 20 \mathrm{se...

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A radioactive sample contains \( 10^{6} \) radioactive nuclei. Its half life is \( 20 \mathrm{sec} \). Number of remaining nuclei after 10 seconds.
(a) 7.09
(b) \( 7.09 \times 10^{5} \)
(c) 79
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