Em orders some new socks. The cost of each pair of socks is $5. A one-time shipping fee of $6 is included in her order. The total cost of her order is $61. How many pairs of socks did she buy? Write and solve an equation to solve the problem.

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.