Answer:
The annual stated interest rate for the debenture bonds is 12%.
Step-by-step explanation:
Face value of bonds = $200,000 
 Carrying value of bonds = $185,953 
 Interest expense debited on June 30 = $13,016 
 Cash payment for interest on June 30 = $12,000 
 Semi annual interest payment on bonds = Face value of bonds x Stated rate of interest x 6/12 
 12,000 = 200,000 x Stated rate of interest x 6/12 
 Stated rate of interest = 12,000 x 12/6 x 1/200,000 
 = 12%
Therefore, The annual stated interest rate for the debenture bonds is 12%.