Question 1029116
Using the formula {{{A = P(1+r/n)^(nt)}}} with A = 2P, r = 0.06, n = 2, we get

{{{2 = (1+0.06/2)^(2t)}}}

<==> {{{2 = 1.03^(2t)}}} ==> {{{t = ln2/(2ln1.03)}}}

==> t = 11.7 years.