Question 848065
{{{t=-k*ln(1-(c/X))}}}
{{{k=0.25}}}
{{{c=0.9X}}}
{{{t=-0.25*ln(1-((0.9X)/X))}}}
{{{t=-0.25*ln(1-0.9)}}}
{{{t=-0.25*ln(0.1)}}}
{{{t=-0.25*(-2.303)}}}
{{{t=0.58}}} hrs