Mathematics for IGCSE & O level - Limits Of Accuracy (Section 2 - No. 28)

A mass is 9.81s. What is the upper and lower bound of 9.81s?

9.8 s and 9.9 s

9.805 s and 9.815 s

9.75 s and 9.85 s

9.80 s and 9.81 s

To the nearest hundredth: the lower bound is 9.805 seconds and the upper bound is 9.815 seconds.