The expression for the total volume of the two storage cubes can be written as a³ + 12
Volume of a cube = a³
Hence, the volume of the large cube can be expressed as a³
Volume of smaller cube = 12 ft³
The total sum of the volume of the storage cubes can be expressed thus :
Volume of large cube + Volume of small cube
Total volume = a³ + 12
Therefore, the total volume of the storage cubes is a³ + 12
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