Please help me white this it will be in the Picture. And do not look at Number 3

Answer:
[tex]volume = {s}^{3} \\ = ( \frac{1}{2} ) ^{3} \\ = ( \frac{ {1}^{3} }{ {2}^{3} } ) \\ = \frac{1}{9} \: {ft}^{3} [/tex]