The amount that must be put aside now is $458,796.85.
The first step is to determine the future value of the annuity:
Future value = yearly payment x annuity factor
Annuity factor = {[(1+r)^n] - 1} / r
Where:
$40,000 x [(1.06^20) - 1] / 0.06 = $1,471,423.65
Now, determine the present value of this amount: $1,471,423.65 / (1.06^20) =$458,796.85
To learn more about present value, please check: https://brainly.com/question/26537392