Final answer:
Jeb is allowed to watch between 8 and 10 hours of television per week.
Step-by-step explanation:
To find the reasonable range for how much television Jeb is allowed to watch, we need to subtract 2 hours from his brother's allowed time. Jeb's brother is allowed to watch 10 hours a week, so Jeb can watch 10 - 2 = 8 hours per week. Therefore, a reasonable range for how much television Jeb is allowed to watch is between 8 hours and 10 hours per week.