What is a possible disadvantage of using a hydroelectric dam as a source of energy? A Hydroelectric dams can harm the aquatic ecosystems both above and below the dam.
B Hydroelectric dams can harm the atmosphere by producing toxic gas.
C Hydroelectric dams do not produce carbon dioxide emissions.
DHydroelectric dams do not produce radioactive waste.

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.