Question 1198639
6.1% per year = 3.05% per half year..
using an online financial calculator such as the one found at <a href = "https://arachnoid.com/finance/" target = "_blank">https://arachnoid.com/finance/</a>, i get 19.43 half years..
round this up to the next highest integer to get 20 half years.


here's what the results look like.


<img src = "http://theo.x10hosting.com/2022/112802.jpg">