Grade 12 calculus. Multiple choice. Rough notes included please

| Question 1 {1 point} Determine the angle between vectors _;, :~ a: 10,3,9 andb: 3,3,12 if}. 52.9 deg 9U deg 311 deg Iii:1: 142.? deg Question 2 {1 point} If F)' = 33/6 EM'E)' = 5 and the angle between them i5135I degrees _}:' then {1 - bis: - 15 -::iIi::- 15.5 i" H] 15 -:121:- _1 W3 Question 3 {1 point} Given (m) 3e: Wi 4) (2-: 1) determine which pair at vectors is perpendicular. {a} a and i: if} b and c .f :3 e and d a and h Question 4 (1 point) Given vectors Q = - -2i + j+ k and b = 2i + j + k determine the magnitude of Cwhen c = a x b O 8 04V2 O2V/2 Question 5 (1 point) The cross product of vectors a = -2, 3, 5 andb = -4, 1, - 6 is: O (8, 3, -30) O (-23, -32, 10) O (-23, -32, -14) O (-23, -8, 10)