Sandy's mom is buying fabric for a prom dress. she already has 4 1/4 yards of fabric at home, and she needs a total of 17 3/6 yards of fabric for the dress. how much more fabric, in yards will sandy's mom need to buy in order to complete the dress?

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.