Answer :
Okay, here we have this:
We need to convet the displacement in cubic inches to cubid feet, so we obtain the following:
[tex]\begin{gathered} 409cubic\text{ inches}\cdot\frac{1\text{ cubic f}eet}{1728\text{ cubic inches}} \\ =0.23669 \\ \approx0.24 \end{gathered}[/tex]Finally we obtain that the displacement in cubic feet is 0.24.