Answer:
[tex]0\leq E<1[/tex]
Step-by-step explanation:
Truncation is the act of simply discarding every digit past a determined number of digits. In this case, Millie decided to use only the first digit.
This means that Millie's actual number could range from 8.0000... all the way to 8.9999... That is, it could range from exactly 8 to just under 9 (it could not reach exactly 9 since the first digit is 8).
The error is the difference between the actual number and the truncated value.
The error interval is:
[tex]8.0000...-8\leq E \leq 8.9999...-8\\0\leq E \leq 0.9999...\\0\leq E<1[/tex]
The error is equal to or greater than zero and less than 1.
