30o
R
A
B
C
A = -4.65 i
B = -(12.7 sin 30o)i + (12.7 cos 30o)j = -6.35 i + 11.0 j
C = 11.0 i
R = A+B+C= -4.65 i + (- 6.35 i + 11.0 j) + 11.0 i
= -11.0 i +11.0i + 11.0j = 11.0 j
(11.0 km due north)
take i (east)
j(north) -i (west) -j (south)