Given:
The length of the string is 9 cm rounded to the nearest cm
To Find:
(i) The lower bound
(ii) The upper bound
Step-by-step explanation:
The lower bound is the shortest possible length of the string when rounded to the nearest cm gives you 9 cm.
The upper bound is the longest possible length of the string when rounded to the nearest cm gives you 9 cm.
Solution
Find the lower bound:
The number is 9 cm
lower bound = 8.5 cm
Find the upper bound
The number is 9 cm
upper bound = 9.4 cm
Answer: Lower Bound = 8.5 cm. Upper Bound = 9.4 cm