**1. What is the difference between significant figures and decimal places?**

When working out

significant figures, start at the firstnon zerodigit.When working out

decimal places, start at thedecimal point.

**2. When writing a number such as 530 046, correct to 3 sig.figs do the zeroes count?**

Yes, the answer is 530 000

**3. How about when writing a number such as 0.0530046, correct to 3 sig.figs do the zeroes in front of the 5 count?**

No,the answer is 0.0530