In her math class, Elena has been learning about how to use the identity property of multiplication with fractions. She is still a little confused. She wants to write a fraction as one whole. She wrote and which is correct? How do you know?

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.