Find the Specified Domain and Express It in Interval Notation $f ( x ) = - 5 x ^ { 2 } - 7$

Multiple Choice

Find the specified domain and express it in interval notation.
-If $f ( x ) = - 5 x ^ { 2 } - 7$ and g(x) =x+5 , evaluate (f-g) (-3) .

A) -60
B) 55
C) -54
D) -44