Credit terms. Find the effective annual rate of the following credit terms: a. 2.1% discount if paid within 7 days or net within 30 days b. 1.8% discount if paid within 28 days or net within 60 days c. 0.6% discount if paid within 11 days or net within 45 days d. 0.9% discount if paid within 17 days or net within 30 days a. What is the effective annual rate of a 2.1% discount if paid within 7 days or net within 30 days?