A widget factory has a fixed operating cost of $3,600 per day plus costs $1.40 per widget produced. If a widget sells dor $4.20,
what is the least number of widgets that must be sold per day to
make a profit?

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.