If a lender makes a simple loan of $$600$ for $2$ years and charges $5\%,$ then the amount that the lender receive at maturity is $$660.($Round your response to the nearest two decimal place$)$

If a lender makes a simple loan of $$2000$ for one year and charges $$50$ interest, then the simple interest rate on that loan is $2\mathrm{.}5\%.($Round your response to the nearest whole number$)$

If a borrower must repay $$106\mathrm{.}50$ one year from today in order to receive a simple loan of $$100$ today, the simple interest on this loan is

A$.5\mathrm{.}0\%$

B$.6\mathrm{.}5\%$

C$.65\%$

D$.6\mathrm{.}0\%$