Final answer:
The APR for Big Dom's Pawn Shop is 252%.
Step-by-step explanation:
The APR for Big Dom's Pawn Shop can be calculated by determining the annual interest rate equivalent to the monthly interest rate of 21%. To calculate the APR, we multiply the monthly interest rate by 12 to get the annual interest rate.
APR = Monthly Interest Rate x 12
APR = 21% x 12 = 252%.