Rounding to Significant Figures

Question 1:

Round to 1 s.f. 0.07349

0.07

Question 2:

Round to 3 s.f. 8431.9

8430

Question 3:

Round to 1 s.f. 0.00031592

0.0003

Question 4:

Round to 3 s.f. 3.5885

3.59

Question 5:

Round to 2 s.f. 0.13054

0.13

Question 6:

Round to 1 s.f. 38.893

40