Find the Derivative of the Function $$f ( x ) = 0.2 x ^ { - 13 }$$

Multiple Choice

Find the derivative of the function. $$f ( x ) = 0.2 x ^ { - 13 }$$

A) $- \frac { 0.34 } { x ^ { 0.2 } }$
B) $- \frac { 0.34 } { x ^ { 2.7 } }$
C) $- 0.34 x ^ { 2.7 }$
D) $- 0.34 x ^ { 0.7 }$