The Beibers area family of 4 living on a monthly budget of $5,000. Mr. Beiber has a fulltime job and takes home $1,000 a week. Mrs. Beiber has a part-time job and makes $10 for every hour she works. How many hours per month does Mrs. Beiber need to work to make sure she and Mr. Beiber meet their monthly budget

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.