What is the measure of angle x?

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.

Y+ 2/y is it a polynomial in one variable or not? and if so, why?

What are the triple angle formulas? is it related to double angle identities?