Knowledge/Understanding Multiple Choice: [10 Marks] 1. If u = [2, 3, 4] and v = [-7, -6, -5] find Zu - 30 a) [9, 9, 9] b) [-17, -12, -7] c ) [25, 24, 23] d) [25, -12, 9] 2. If u = [2, 3, 4] and v = [-7, -6, -5] find | 2u - 30 + 5) | a) V2525 b) V1995 c) V625 d) v588 3. If u = [2, 3, 4] and v = [-7, -6, -5] find u . i a) [-14, -18, -20] b ) - 27 c) [-9, -9, -9] d) -52 4. If u = [2, 3, 4] and v = [-7, -6, -5] find w orthogonal to both u & v a) [9, -18, 9] b ) V486 c) [-14, -18, -20] d) [9, 9, 9] 5. If lu = 4, |v = 7 and the angle between these vectors is 1470 then u . v is: a) 15.2 b ) 23.5 C) - 15.2 d) -23.5 6. If lu|= 4, |v|= 7 and the angle between these vectors is 1470 then u x v is: a) 15.2 b ) 23.5n c) 15.2n d) -23.5 7. Simplify: 3u + 40 - 8(u - 20 ) a) -5u + 20 b) - 5u + 20v c) 4u + 20 d) -5u + 60