text: dougdough has a car loan for  $13,000 at 8 1/2 % interest. how much interest will he pay in 5 years ? dough has a car loan for  $13,000 at 8 1/2 % interest. how much interest will he pay in 5 years ?  a. $5,200 b. $5,525 c. $5,850 d. $7,475 if it is simple interest, then i = prt i = 13000*.085*5 i = 5,525