Answer:
Effective Annual Rate of Interest = 8%
Explanation:
given data
bonds = Â $1,000
solution
we get here  when here Effective rate  interest is semi-annual that is
Effective rate = (Effective interest ÷ Outstanding Balance) × 100   .........1
put here value and we get
Effective rate  =  [tex]\frac{345,639}{8,640,967}[/tex]  × 100
Effective rate = 0.04 × 100
Effective rate  = 4%
so here Effective Annual Rate of Interest = 4% × 2
Effective Annual Rate of Interest = 8%