Upper and Lower Bounds

Question 1:

Find the lower bound of 8.91 rounded to 2 d.p.

8.905

Question 2:

Find the lower bound of 7.32 rounded to 2 d.p.

7.315

Question 3:

Find the lower bound of 6.31 rounded to 2 d.p.

6.305

Question 4:

Find the lower bound of 290 rounded to 2 s.f.

285