Please help me on this. I could really use it.

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Could somebody me with this radical simplification?

Which of the following graphs could represent a cubic function?