**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, answer is 530 000 .

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

No, answer is 0.0530.

**4. How many significant figures are there in the number 530 046?**

There are 6 significant figures − the two zeroes do count.

**5. Are all zeroes after the decimal point significant?**

Yes, a measurement such as 8.900 m should be assumed to be accurate to 4 significant figures.