Carf 25ng W 1. The effectiveness of studying for an exam depends on how many hours a student studies. Some experiments show that if the effectiveness, E is put on a scale of O to 10, the 130:) = 0.5 [10 + tieE], where t is the number of hours spent studying for an examination. If a student has up to 30 hours for studying, how many hours are needed for maximum effectiveness? 2. Determine the absolute extrema off(x) = x 32" on the interval x E [22]