What rate of interest did you receive over a period of 90 days if your principal was $5000 and it has a maturity value of $6000? Select one: A. 81.11% B. 811.11% C. 0.811% D. 0.0811% E. 8.11% Kennedy owed $925 to his friend a year ago and owed $600 to another friend 6 months ago. If he clears his debt today, what total payment is he expected to make, if the simple interest of 20% is applicable? Select one: A. $1110 B. $1525 O C. $660 O D. $1800 E. $1770 What principal will have a future value of $640, at 12.1% in 6 months? Select one: A. $800 B. $600 C. $603.50 O D. $678.72 E. $370.80