How much invested the year you were born,

so that you have $$20,000$ today.

Your age

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Assuming they can earn $9\%$ compounded monthly.

$i=\frac{0\mathrm{.}09}{12}=0\mathrm{.}0075,n=1240=480$

$PV=20,000(1+0\mathrm{.}0075{)}^{-480}$

$PV=$