Help I’m Confused!! Can you please explain to?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

Dawn is selling her mp3 player for 3 4 of the original price. the original price for the mp3 player was $40. how much is she selling her mp3 player for?