1. 0.0026  Answer is correct for any number between 0.0024 to 0.0028
2 (i) 19
  (ii) 109
3.(a) 
    (i) 3
    (ii)4 
  (b) 
    (i) 1
    (ii) 2
  (c) 2
  (d) No
  (e) Yes
4. 0.56
5. 
  (a)No
  (b)Yes


6) b)

7) b)