Answer:
effective interest rate = 4.75 %
Explanation:
given data
principal = $108,000
time = 8 months =
year
rate = 10%
solution
we get here first interest that is
interest = principal × rate × time .................1
put here value
interest = $108,000 × 10% × 
interest = $7200
so here effective interest rate will be here as
effective interest rate =
× time ...........2
put here value
effective interest rate =
×
effective interest rate = 0.04761
effective interest rate = 4.75 %