How do use a net to find the surface area of a square pyramid

If the value of cos330°is√3/2 then find cos 165°.

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.

Select the correct answer and solve for y