The sides of a square are three to the power of two sevenths inches long. what is the area of the square?

Twenty points. 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

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

Can someone me with this? i’m not sure what to put for my equations.