Question 1026250
What you have is:
{{{ 3P = P*e^(r*t) }}}
Divide both sides by {{{ P }}}
{{{ 3 = e^(r*t) }}}
This shows that the amount of the 
investment has no effect on the answer
{{{ r = .0425 }}}
{{{ e^( .0425t ) = 3 }}}
Take the natural log of both sides
{{{ .0425t = ln(3) }}}
{{{ .0425t = 1.0986 }}}
{{{ t = 25.85 }}}
Is this years? I think so- check on this