Find (A) the Dot Product of the Two Vectors and (B)

Multiple Choice

Find (a) the dot product of the two vectors and (b) the angle between the two vectors. $$\{ - 10,4 \}$$ and $$( 8,4 )$$

A) $72 , - 41 ^ { \circ } 38 ^ { \prime }$
B) $- 96,131 ^ { \circ } 33 ^ { \prime }$
C) $4,096,131 ^ { \circ } 40 ^ { \prime }$
D) $- 64,131 ^ { \circ } 38 ^ { \prime }$
E) $- 64 , - 41 ^ { \circ } 33 ^ { \prime }$