Find the error intervals for the following rounded numbers
Question 1:
20000 (1 s.f.)
15000≤x<25000
Question 2:
2.11 (2 d.p.)
2.105≤x<2.115
Question 3:
3.5 (2 s.f.)
3.45≤x<3.55
Question 4:
90000 (1 s.f.)
85000≤x<95000