Arectangular prism is completely packed with 90 cubes of edge length fraction 1 over 2 inch, without any gap or overlap. which of the following describes the volume of this rectangular prism? 11 unit cubes and 1 smaller cube of volume fraction 1 over 8 cubic inch 22 unit cubes and 4 smaller cubes of volume fraction 1 over 8 cubic inch each 11 unit cubes and 2 smaller cubes of volume fraction 1 over 8 cubic inch each 22 unit cubes and 2 smaller cubes of volume fraction 1 over 8 cubic inch each could someone teach me the steps ? i reviewed the lesson, i still don't understand