The volume of the rectangular prism can be calculated as:
Volume = length x width x height
Volume = 6 inches x 6 inches x 2 inches
Volume = 72 cubic inches
The volume of the cube can be calculated as:
Volume = side x side x side
Volume = 2 inches x 2 inches x 2 inches
Volume = 8 cubic inches
Therefore, the total volume of the composite figure is the sum of the volumes of the rectangular prism and the cube:
Total volume = 72 cubic inches + 8 cubic inches
Total volume = 80 cubic inches
Therefore, the volume of the composite figure is 80 cubic inches.