Question 1104531
{{{ A = P*e^( r*t ) }}}
{{{ P = 8500 }}}
{{{ r = .13 }}}
{{{ A = 2*8500 }}}
-----------------------
{{{ 17000 = 8500*e^( .13t ) }}}
{{{ 2 = e^( .13t ) }}}
Take the natural log of both sides
{{{ ln(2) = .13t }}}
{{{ .6931 = .13t }}}
{{{ t = 5.332 }}}
The time is 5.332 years