Which always share the properties of parallel lines?

A. the intersection of a wall and ceiling

B. the front edges of horizontal shelves in a bookshelf

C. the hands of a clock

D. the top and side edge of a window

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.