Let $f$ be the function given by $f ( x ) = 300 x - x ^ { 3 }$. On which of the following intervals is the function $f$ increasing?
(A) $( - \infty , - 10 ]$ and $[ 10 , \infty )$
(B) $[ - 10,10 ]$
(C) $[ 0,10 ]$ only
(D) $[ 0,10 \sqrt { 3 } ]$ only
(E) $[ 0 , \infty )$
Let $f$ be the function given by $f ( x ) = 300 x - x ^ { 3 }$. On which of the following intervals is the function $f$ increasing?

(A) $( - \infty , - 10 ]$ and $[ 10 , \infty )$

(B) $[ - 10,10 ]$

(C) $[ 0,10 ]$ only

(D) $[ 0,10 \sqrt { 3 } ]$ only

(E) $[ 0 , \infty )$