Can someone plz help me with this one problem plz I’m being timed!!

(I’m marking brainliest)

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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