Ken keeps paper clips in a box that is the shape of a cube. each side of the cube is 3 inches. what is the volume of the cube?

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Ill mark the brainliest if you me with the these three questions 7,8,9

What is the total surface area of this square pyramid?