Time to a specified mass
Time to a specified mass
5 marks
TGM Original
A sample has mass \(m=80\mathrm e^{-0.15t}\) grams after \(t\) hours, where \(t\ge0\). Find the time at which its mass is \(30\) grams, correct to \(3\) significant figures.[5]
Solution:
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Answer:\(6.54\) hours.
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