Multiple Choice Identify the choice that best completes the statement or answers the question. 6. If c = [-3, 2] and d = [2, -4], find -c +3d. a. [3, -10] c. 5 b. 277 d. [9, -14] 7. If | al = 450, b =775, and the angle between a and b is 1209, find a . b. a. 348 750 C. 302 026.36 b. -174 375 d. 174 375 8. If a = [5, -3, 2] and b = [-5, 3, -2], find the angle between a and b. a. 180 C. 90 b. 09 d. 60 9. If u = [1, 2] and v = [4, -2], find | proj; u ). a. 0 C. 5 8 b. 20 . 209. If u = [1, 2] and v = [4, -2], find | proj- ul. a. 0 C. 8 b. d. 20 ~20 10. A force of 30 N is applied to the handle of a wrench at 70 to the handle, 15 cm from the centre of the bolt. Determine the magnitude of the torque. a. 4.23 N.m c. 423 N.m b. 1.54 N.m d. 154 N.m 1 1. A ship is on a heading of 050 at 30 knots. Write this velocity as a Cartesian vector. a. [22.98, 19.28] C. [30, 30] b. [19.28, 22.98] [50, 30]