Upper and Lower Bounds

Question 1:

Find the lower bound of 3700 rounded to 2 s.f.

3650

Question 2:

Find the lower bound of 50 rounded to 1 s.f.

45

Question 3:

Find the lower bound of 929.4 rounded to 1 d.p.

929.35

Question 4:

Find the lower bound of 500 rounded to 1 s.f.

450