Find the Magnitude and Direction Angle for the Following Vector $\langle 3 \sqrt { 3 } , - 3 \sqrt { 3 } \rangle$

Multiple Choice

Find the magnitude and direction angle for the following vector. Give the direction angle as an angle in [0°, 360°) rounded to the nearest tenth.
- $\langle 3 \sqrt { 3 } , - 3 \sqrt { 3 } \rangle$

A) $3 \sqrt { 3 } , 315 ^ { \circ }$
B) $3 \sqrt { 6 } , 315 ^ { \circ }$
C) $3 \sqrt { 3 } , 135 ^ { \circ }$
D) $3 \sqrt { 6 } , 135 ^ { \circ }$