Multiple Choice Calculus Help

Question 7 (1 point) Let a = (1, 2, 3) and b = (-2, 0, 3). Find 23 + 36. O a) (-4, 4, 15) Obj (-2, 0, 9) O c) (B, 2, 6) O d) (-1, 2, 6) Question 8 (1 point) Given the vectors a = (1, 3, 4) and b = (4, 5. -4), which of the following represent a x b? O al (8, -20, 7) Obj (-32, 20, -7) O c) (4, 15, 16) Od) -3 Question 9 (1 point) In the previous question, what is the angle between the two given vectors to the nearest degree? O al 94" d 36" O d) 24" Question 10 (1 point) A math student is walking with a velocity of 5 m/s [N53"E). Which of the following is the Eastern component of this velocity in m/'s? O a) 2 Obj 3 Od4 O d) 5Question 11 (1 point) Consider the vectors P and 7. Calculate p . q if (p) = 4 cm and |4) = 5 cm and the angle between them is 30". O al 10,3 Ob 600 Odg,3 O d) 10 Question 12 (1 point) If u = (0, 2, 3) and v = (1, 3, -1), find the projection of u onto v. Oahu Od (1, 1, -1) Od) (3,1, -;)