Question 247761
{{{A/2A = e^(0.5750k)}}}
{{{1/2 = e^(0.5750k)}}}
{{{Ln (1/2) = Ln (e^(0.5750k))}}}
{{{Ln (1/2)/0.5750 = k}}}
{{{Ln (1/(2*0.5750)) = k}}}
{{{k=-1.2055}}}