A regular dodecahedron is a polyhedron with twelve faces, each of which is a regular pentagon. A space diagonal of the dodecahedron is a line segment which joins two vertices of the dodecahedron which do not lie in the same face. How many space diagonals are there in the dodecahedron?

The volume, v, of a rectangular prism is determined using the formula, where / is the length, w is the width, and his theheight of the prism. carltren solves for w and writes the equivalent equation w=using this formula, what is the width of a rectangular prism that has a volume of 138.24 cubic inches, a height of 9.6 inches,and a length of 3.2 inches?