Question

A length is stated as 4 m correct to the nearest m. What is the lower bound?

Answer 1

The lower bound is the smallest value that rounds up to the given value.

Given value = 4m

The lower bound would be 3.5m

Any number less than .5 rounds down, any number greater to or equal to 0.5 rounds up, so if you have 3.5 or higher it rounds to 4