
Answer:
Hence, the Nominal annual rate is 20.28%. Â
Effective annual rate is 22.43%.
Explanation: Â
Amount borrowed = $38,672. Â
Weekly repayment for 16 weeks = $2,500. Â
Loan repayment = (Loan amount x r) / {1-(1+r)-n} Â
$2,450 = ($38,672 x r)/{1-(1+r)-16} Â
r= 0.39% Â
Weekly interest rate = 0.39% Â
Nominal annual rate = 0.39 % x  52 weeks = 20.28% Â
Effective annual rate = [tex](1 + 0.0039^{52} ) - 1[/tex] = 0.2243 = 22.43%