While baking, Evan discovered a recipe that required 1/2 cups of walnuts for every 2 1/4 cups of flour. How many cups of walnuts will he need for 4 cups of flour?(redo, good explanation and steps)

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?