Find the Angle Between the Two Planes in Degrees $$\begin{array} { l } x + 2 y + 6 z = 0 \\- 4 x - y - 3 z = 0\end{array}$$

Multiple Choice

Find the angle between the two planes in degrees. Round to a tenth of a degree.
$$\begin{array} { l } x + 2 y + 6 z = 0 \\- 4 x - y - 3 z = 0\end{array}$$

A) $10.8 ^ { \circ }$
B) $47.3 ^ { \circ }$
C) $137.3 ^ { \circ }$
D) $36.3 ^ { \circ }$
E) $2.4 ^ { \circ }$