# Question #1bdbf

I found $170 g$
Density $\rho$ mass $m$ and volume $V$ are related as:
$\rho = \frac{m}{V}$
$m = \rho \cdot V = 2.7 \cdot {\left(4.0\right)}^{3} = 172.8 g$
$\textcolor{red}{\text{BUT with two significant figures:} = 170 g}$