If a lender makes a simple loan of $400 for 4 years and charges 5%, then the amount that the lender receive at maturity is $ ?. (Round your response to the nearest two decimal place)

If a lender makes a simple loan of $500 for one year and charges $90 interest, then the simple interest rate on that loan is % ?. (Round your response to the nearest whole number)

If a borrower must repay $106.50 one year from today in order to receive a simple loan of $100 today, the simple interest on this loan is

A. 6.0%

B. 6.5%

C. 65%

D. 5.0%