Can someone help me with this question? I've been stuck on it for almost 30 minutes :(

Which graph represents the following piecewise defined function?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

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.