Find the Specified Domain and Express It in Interval Notation $f ( x ) = x ^ { 3 }$

Multiple Choice

Find the specified domain and express it in interval notation.
-If $f ( x ) = x ^ { 3 }$ and g(x) =x+2 , evaluate $\left( \frac { \mathrm { f } } { \mathrm { g } } \right) ( - 2 )$

A) 1
B) Undefined
C) -8
D) 0