The cost of a cd at ernesto's music emporium is $12, including tax. brian has a $100 gift card from ernesto's. what is his balance after he buys 4 cds?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

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.