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6 September, 14:49

Ample and h is the half-life, in days, of the substance. a sample contains 18% of its original amount of radon-222. the half-life of radon-222 is about 3.8 days. which is the best estimate for the age of the sample?

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  1. 6 September, 15:05
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    Try adding 700% because of the x in y
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