Radon-222The decay equation for radon-222 gas is known to
Chapter 1, Problem 1.6 84(choose chapter or problem)
Radon-222The decay equation for radon-222 gas is known to be y=y0e-0.18t, with t in days. About how long will it take the radon in a sealed sample of air to fall to 90% of its original value?
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