Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
- $f ( x ) = x \sin ( 10 x ) ; x = 8$

A) $- 9.8247$
B) $- 7,950.7128$
C) $- 8.8297$
D) $7,950.7128$