Question 1100434
{{{120000e^(-1.7t)=5400e^(-0.1t)}}}
{{{120000/5400=e^(-0.1t)/e^(-1.7t)}}}
{{{200/9=e^(-0.1t+1.7t)}}}
{{{200/9=e^1.6t}}}
{{{ln(200/9)=1.6t}}}
{{{t}}}{{{"="}}}{{{ln(200/9)/1.6}}}{{{"="}}}{{{approximately1.938}}}