Answer
$6.65\; g/cm^3$.
Work Step by Step
The given value is
$=415\;lb/ft^3$
Covert the given value to $g/cm^3$.
First convert pounds to gram.
Second convert $ft^3$ to $cm^3$.
$=415 \frac{lb}{ft^3}\times \frac{454\;g}{1\;lb}\times (\frac{1\;ft}{30.48\;cm})^3$
Simplify.
$=6.65\; g/cm^3$.
