The density of copper is `7.8 g cm^(-3)` and its weight is `5.642 g`. Report the volume of copper to correct decimal point.

Explanation

To find the volume of copper given its density and weight, we can follow these steps:

### Step 1: Understand the relationship between density, mass, and volume.
The formula that relates density (D), mass (m), and volume (V) is:
\[ D = \frac{m}{V} \]
From this, we can rearrange the formula to find volume:
\[ V = \frac{m}{D} \]

...