you must solve the problem! show your work!\n• for solids is lxwxh = volume\n• density = mass/volume\n11…

Explanation:

Step1: Calculate volume of rectangular - prism

For a rectangular - prism, the volume formula is $V = L\times W\times H$. For problem 12: $L = 4\text{cm}$, $W = 5\text{cm}$, $H = 6\text{cm}$ $V=4\times5\times6 = 120\text{cm}^3$

Step2: Calculate density

The density formula is $\rho=\frac{m}{V}$, where $m$ is mass and $V$ is volume. For problem 12: $m = 60\text{g}$, $V = 120\text{cm}^3$ $\rho=\frac{60}{120}=0.5\text{g/cm}^3$ For problem 13: $L = 1\text{cm}$, $W = 7\text{cm}$, $H = 3\text{cm}$ $V = 1\times7\times3=21\text{cm}^3$ $\rho=\frac{63}{21}=3\text{g/cm}^3$ For problem 14: $L = 4\text{cm}$, $W = 4\text{cm}$, $H = 4\text{cm}$ $V=4\times4\times4 = 64\text{cm}^3$ $\rho=\frac{16}{64}=0.25\text{g/cm}^3$

Answer:

12. Volume: $120\text{cm}^3$, Density: $0.5\text{g/cm}^3$
13. Volume: $21\text{cm}^3$, Density: $3\text{g/cm}^3$
14. Volume: $64\text{cm}^3$, Density: $0.25\text{g/cm}^3$