An animal shelter spends $1.50 per day to care for each cat and $4.50 per day to care
for each dog. Easton noticed that the shelter spent $52.50 caring for cats and dogs on
Wednesday. Easton found a record showing that there were a total of 23 cats and
dogs on Wednesday. How many cats were at the shelter on Wednesday?

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.