The problem asks us to round the number $0.002473$ to 3 significant figures.

1. Problem Description

The problem asks us to round the number $0.002473$ to 3 significant figures.

2. Solution Steps

Significant figures are used to indicate the precision of a number.

In the number $0.002473$, the leading zeros are not significant. The significant digits are 2, 4, 7, and

3.

To round $0.002473$ to 3 significant figures, we keep the first three significant digits, which are 2, 4, and

7. We look at the next digit, which is

3. Since 3 is less than 5, we round down.

Therefore, $0.002473$ rounded to 3 significant figures is $0.00247$.

3. Final Answer

C. 0.00247