(a/b)^2 simplify need help

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

Select a graph that have an equation with a < 0

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.