How to find out how many cubes it takes? can someone explain to me how to do the how many cubes does it take thing?
example:
kayla stacked her cubes to make this rectangular prism.
how many cubes did kayla use?

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x