20. A vector 9 meters in length forms angles of 21 and 44 with two component vectors. Find the magnitudes of the two vectors. The magnitude of the other vector = ? A. 6.5 meters B. 11.7 meters C. 6.2 meters D. 6.9 meters 21. The horizontal and vertical components of a vector are 10 meters and 24 meters respectively. Find the magnitudes of the resultant vector and the angle that it forms with the horizontal. What is the angle that it forms with the horizontal? A. 43 B. 47. C. 67 D. 23 22. Given that A = 2 i - 3 ], and B = 5i + 7 ], find A + B. A. 7 / + 4j B. 3 / -9j C.27-5j D. 7 / + 10 j 23. Solve for the unknown part of the triangle, if it exists. If a = 50, b = 42, and C = 124, then what does B = ? A. 37' 30' B. 25 20' C. 30' 20' D. 53 0' 24. Find the cube roots of 1 + i. Leave the answers in polar form. What is one answer? A. V2(cos 165 + / sin 165) B. V2(cos 135 + / sin 135.) C. V2(cos 135 + i sin 135) D. V2(cos 1550 + / sin 155)