Answer:
i=4%
Step-by-step explanation:
this problem is possible to solve applying the principle of future value, keep in mind the next formula:
![FV=PV*(1+i)^(n)](https://img.qammunity.org/2020/formulas/business/high-school/3fgi7t5sus58g6l1poejtp1ovdo0zi8myv.png)
where FV is future value, PV is the present value, i is the periodic interest rate and n is the number of periods. So applying to this particular problem we have:
![16,843.93=12,800*(1+i)^(7)](https://img.qammunity.org/2020/formulas/business/college/w4ffi9o0t9l0ylfzi8p1blloykav47sscb.png)
the difference here is that we must solve n so we can do:
![((16,843.93)/(12,800))^(1/7)-1=i](https://img.qammunity.org/2020/formulas/business/college/dbrjqm9wgroumshg49qjceciumhvy8sw33.png)
so i=4%