Barra Moore’s credit card company requires a minimum monthly payment of $19.99. The credit card company charges 21% annual interest. Barra owes $1,000 on this card.
If Barra only pays the minimum monthly payment without any additional purchases, how long will it take him to pay off the credit card? (Do not interpolate the tables; use the nearest figure given.)
How much will Barra end up paying the credit card company when the card is paid off?