Rounding to Significant Figures

Question 1:

Round to 2 s.f. 9.7136

9.7

Question 2:

Round to 2 s.f. 53.06

53

Question 3:

Round to 3 s.f. 77.156

77.2

Question 4:

Round to 2 s.f. 6549.5

6500

Question 5:

Round to 1 s.f. 422.79

400

Question 6:

Round to 3 s.f. 0.0001979

0.000198