Alternatively, perhaps the function is \( C(t) = 10e^{-0.1t} \), then \( C' = -1e^{-0.1t} \), set to -1: then \( e^{-0.1t} = 1 \Rightarrow t = 0 \).

Sat, 02 May 2026 12:49:06 +0000

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