Question: What is the result of dividing 6.38 by 2.0, considering significant figures?

Options:

1. 3.19
2. 3.2
3. 3.0
4. 3.5

Correct Answer: 3.2

Solution:

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 6.38 has 3 significant figures and 2.0 has 2 significant figures, so the answer should be rounded to 2 significant figures: 3.19 becomes 3.2.