Upper and Lower Bounds

Question 1:

Find the upper bound of 8940 rounded to 3 s.f.

8945

Question 2:

Find the upper bound of 1800 rounded to 2 s.f.

1850

Question 3:

Find the upper bound of 12.6 rounded to 3 s.f.

12.65

Question 4:

Find the lower bound of 982.6 rounded to 1 d.p.

982.55