Answer:
13,6%
Explanation:
The first step to calculate the annual interest rate is to calculate the total yearly interest amount you will pay.
So, you'll pay $340 each quarter and, of course, there are 4 quarters in a year,... so a total of $1,360 (4 x $340) for the year.
Then you need to calculate the ratio of that interest amount compared to the loan amount in order to get the yearly interest
[tex]\frac{1,360}{10,000} = 0,136[/tex]
The effective annual rate on the load is then of 13,6%.