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4xx10^23tritium atoms are contained in a...

`4xx10^23`tritium atoms are contained in a vessel. The half-life of decay of trituim nuclei is 12.3 y. Find (a) the activity of the sample ,(b) the number of decays in the next 10 hours (c ) the number of decays in the next 6.15 y.

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The correct Answer is:
`[7.146xx10^(14) dps, 2.57xx10^(19), 1.17xx10^(23)]`
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