1. The minimum number of hours is 5 hours, so the minimum
money earned is:
minimum money = 15.30 * 5 = $76.50
The maximum number of hours is 10 hours, so the maximum
money earned is:
maximum money = 15.30 * 10 = $153
2. Since the words “at least” and “not more than” are
used, hence this is inclusive.
3. The practical range is:
$76.50 ≤ f(t) ≤ $153
