Final answer:
The error interval for number m, which is rounded to 9.4 to 1 decimal place, is [9.35, 9.45).
Step-by-step explanation:
The error interval for a number m, rounded to 1 decimal place with the result of 9.4, represents the range of values that m could originally have been before being rounded. Since the number is rounded to 1 decimal place, the smallest value m could be before rounding up to 9.4 is 9.35, and the largest value m could be before it would round up to the next decimal, 9.5, is 9.449... The error interval is therefore the range from 9.35 to just below 9.45. The error interval for m can be written as [9.35, 9.45).