Question 1089487

Please help me solve this question: {{{Kurt opened a savings account by making an initial deposit of $30,000. If the account accrues an interest of 12% a year, in how many years will he double the money in his account?}}}
<pre>The amount doesn't matter at all. 
In other words, ANY amount with annual compounding interest of 12% will DOUBLE in: {{{highlight_green(matrix(1,2, 6.12, years))}}}