Answer:
11.79 m
Step-by-step explanation:
Break into horiz and vert components then add them....then use Pythag theorem for magnitude
(B is at angle 250° )
Horiz : 7.7 cos 27.8 + 16.3 cos 250 = 1.236 m
Vert : 7.7 sin 27.8 + 16.3 sin 250 = -11.73
Mag^2 = 1.236^2 + (-11.73)^2
Magnitude = 11.79 m
Direction = arctan ( -11.73/1.236) = - 84° ( = 276°)