Answer:
$3,233.12
Explanation:
Data given in the question
Purchase value of two coins = $790
First coin rate = 7.3%
Second coin rate = 6.7%
So, after considering the above information, the amount worth in 20 years
= Purchase value of two coins ×(1 + interest rate)^number of years
= $790 × (1 + 0.073)^20
= $790 × 4.0925541961
= $3,233.12