This exam consists of 9 problems, numbered 1 9. For partial credit you must present your work clearly and understandably and justify your answers. The use of calculators is not permitted on this exam. The point value for each question is shown next to each question. Multiple choice: [6 points each] in each of problems 1 5, circle the best answer. 4 cos2 sin d . (a) 0 (b) 1 (c) (d) 6: what is the average value of f (x) = x x2 + 4 on the interval 0 x 2? (a) (b) (c) (d) (e) It requires 5 newtons of force to be held 10 cm from rest. How much work (in joules) is done in stretching the spring from rest to. 20 cm? (a) 0 (b) 1 (c) 10 (d) 100 (e) 1000. Which of the following statements about f (x) are true: f (1) = 0.