Mid points I need help with them, they are not my strong suit. My friend normally helps out but he wont always be there.

Can someone answer these problems for me

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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.