Solve the Problem $$\begin{array} { l } C ( x ) = 0.4 x + 450 \\R ( x ) = 0.9 x\end{array}$$

Multiple Choice

Solve the problem.
-Given the cost function, C(x) , and the revenue function, R(x) , write the profit function from producing and selling x units of the product. $$\begin{array} { l } C ( x ) = 0.4 x + 450 \\R ( x ) = 0.9 x\end{array}$$

A) $P ( x ) = 0.5 x - 450$
B) $P ( x ) = 0.5 x + 450$
C) $P ( x ) = - 0.5 x - 450$
D) $P ( x ) = - 0.5 x + 450$