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  3. the half life of radium-226 is 1620 years. initial

The half life of radium-226 is 1620 years. Initially, there are 2-grams in a sample.(a)...

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The half life of radium-226 is 1620 years. Initially, there are 2-grams in a sample.(a) Half life decay can be modeled by an exponential function: N(t) = N0 ekt. Use the growth equation, kt = ln (N1/N0) to find k.(b) How many grams remain after 10 years?(c) How long will it take for 80% of the 2 grams to decay?

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