Question 423014
{{{e^(-0.413t)=5}}}



{{{ln(e^(-0.413t))=ln(5)}}}



{{{-0.413t*ln(e)=ln(5)}}}



{{{-0.413t=ln(5)}}}



{{{t=ln(5)/(-0.413)}}}



{{{t=-3.8969440979034}}}



{{{t=-3.897}}} (this answer is approximate)



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