QUESTION

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Problem \#7: A sample of tritium-3 decayed to $83 \%$ of its original amount after 4 years. How long would it take the sample (in years) to decay to $23 \%$ of its original amount? Problem \#7: Enter your answer symbolically, as in these examples Just Save Submit Problem \#7 for Grading \begin{tabular}{|r|l|l|l|} \hline $\begin{array}{r}\text { Problem \#7 } \\ \text { Your Answer: } \\ \text { Your Mark: }\end{array}$ & $\underline{\text { Attempt \#1 }}$ & Attempt \#2 & Attempt \#3 \\ \hline \end{tabular}

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XSAKZA The First Answerer