Matrix operations, find AB

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.