What is the value of    correct to two decimal places?

1. 0.07
2. 0.08
3. -12.54
4. -12.55

The radius of Mars is approximately metres. Write this number in scientific notation, correct to two significant figures.   (2 marks)

Evaluate    correct to three significant figures.   (2 marks)

What is the value of   , correct to 3 significant figures?   

Evaluate    correct to four significant figures.  (2 marks)

What is    correct to three significant figures?  

Evaluate    correct to three significant figures.   (1 mark)