Calvin Johnson has a $4 comma 500

4,500 debt balance on his Visa card that charges 17.9

17.9 percent APR compounded monthly. In2009, Calvin's minimum monthly payment is 3

3 percent of his debtbalance, which is $135

135. How many months(round up) will it take Calvin Johnson to pay off his credit card if he pays the current minimum payment of $ 135

$135 at the end of eachmonth? In2010, as the result of a federalmandate, the minimum monthly payment on credit cards rose to 4

4 percent. If Calvin made monthly payments of $180

180 at the end of eachmonth, how long would it take to pay off his creditcard?

a.If Calvin made monthly payments of $135

135 at the end of eachmonth, how long would it take to pay off his creditcard?