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Solve the problem. 16) Two forces, F1 and F2, of magnitude 60 and 70 pounds, respectively, act on an object. The direction of F1 is N40'E and the direction of F2 is N40W. Find the magnitude and the direction angle of the resultant force. Express the direction angle to the nearest tenth of a degree. A) || F|) = 92.20; 0 = 80 B) ||F| = 92.20; 0 = 89.40 C) | F| = 94.63; 0 = 87.20 D) | F| = 99.37; 0 = 93.70 Find the angle between the given vectors. Round to the nearest tenth of a degree. 17) u = -i + 4j, v =5i - 6j A) 0.90 B) 65.70 C) 154.20 D) 64.20 Use the dot product to determine whether the vectors are parallel, orthogonal, or neither. 18) v = 4i + 3j, w =3i - 4j A) parallel B) orthogonal C) neither Find projwV. 19) v=i - 3j; w = 5i + 12j 155 . A) 372 186 . 31 : 93 155 . 169 169 2 10 + - 372 10 13 13