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Real-World Applicationsmedium
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A radioactive isotope decays such that its mass after ttt years is M(t)=M0⋅e−0.1tM(t) = M_0 \cdot e^{-0.1t}M(t)=M0​⋅e−0.1t. How long does it take for the substance to decay to e−1e^{-1}e−1 (approximately 36.8%36.8\%36.8%) of its original mass?