Upper and Lower Bounds

Question 1:

Find the upper bound of 1000 rounded to 1 s.f.

1500

Question 2:

Find the upper bound of 8300 rounded to 2 s.f.

8350

Question 3:

Find the lower bound of 0.7 rounded to 1 d.p.

0.65

Question 4:

Find the upper bound of 32.4 rounded to 3 s.f.

32.45