please help me!!!! I just need to know which answers are correct in these multiple choice questions , thank you so so much.

Part A. Multiple Choice. Circle your answers clearly. 1. Which of the following vectors is equivalent to 50 [$53.W ]? a [-30, 40] b. [-30, -40] c. [-40, 30] d. [-40, -30] 2. Which of the following vectors is not collinear to the others? a. [2, -5] b. [-14, 35] c. [22, 55] d. [52, -130] 3. [-2,4]-[6,-3]=.. a. 0 b. -24 c. 30 d. [-12, -12] 4. Which of the following expressions cannot be evaluated? a (axbx (5xc) b. (axb). (5xc) a. (a . 5 x 5.2) d. (a . 5)+(5.2) 5. Evan is pushing his car into the auto-shop. He applies a force of 7500N at 150 to the horizontal to move the car 25m. How much work has Evan done? 9 a 48529 J b. 121,929 J c. 142,441 J d. 181,111 J 6. [1,-1,4 ]x [-1,2, -1] =.. a [1, -3, -7] b. [-1, 3, 7] c. [-7, -3, 1] d. [7, 3, -1] 7. What is the angle between [-3, 1, 2] and [4, 6, 3]? a 00 b. 260 c. 90 d. 1540 8. Stephanie is tightening a bolt to fasten a wheel. She uses a ratchet that is 50cm long, applying a force of 150N at 70 to the handle. What is the magnitude of the torque she applies? a 25.7 Nm b. 70.5 Nm c. 2565.2 Nm d. 7047.7 Nm 9. For what value(s) of k are [1, k, -3] and [3, k, 4] orthogonal? a 3 b. -3 C. +3 d. There are none