Mario spent $40.18 on 3 music cd's. the sales tax was $2.33 mario also used a coupe for $1.00 off his purchase. how much did each cd cost

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Find dy/dx using implicit differentiation ln(20+e^xy)=y