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Oksanka [162]
3 years ago
5

After 3 days a sample of radon-222 has decayed to 58% of its original amount.(

Mathematics
1 answer:
iren2701 [21]3 years ago
3 0
Half-life = [elapsed time * log (2)] / [log (begng amt / endg amt)]
half-life =  (3 days * 0.30102999566) / log (1 / .58)
<span>half-life =  0.903089987 / log </span> (<span> <span> <span> 1.724137931)
</span></span></span>half-life =  <span>0.903089987 / 0.23657200643</span>
half-life =  <span> <span> <span> 3.8174 days

Source:
http://www.1728.org/halflife.htm

</span></span></span>
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