Upper and Lower Bounds

Question 1:

Find the lower bound of 90.2 rounded to 3 s.f.

90.15

Question 2:

Find the upper bound of 0.968 rounded to 3 d.p.

0.9685

Question 3:

Find the upper bound of 74.9 rounded to 1 d.p.

74.95

Question 4:

Find the upper bound of 941.4 rounded to 1 d.p.

941.45