After ace is dilated by a factor of 5, it has an area of 100 square inches. What was its area before dilation?

I’m stuck on this i don’t understand.

You are updating your garage and the only thing left to paint is your garage day. you're only going to paint the slide that faces the street. the garage door is 9 fert 8inches tall and 120 inches wide. you need to know the surface area of the side of the garage door to determine how much paint to buy. the hardware store sells paint by how much covers a square foot. what is the surface area you should report to the hardware store what is the answer

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)