In: Math
Find the maximum profit given by the revenue and cost functions below, where x is in thousands of units and R(x) and C(x) are in thousands of dollars.
R(x)= 115x-x^2
c(x)=1/3x^3-6x^2+91x+38
A. 682 thousand dollars
B. 470 Thousand dollars
C. 394 thousand dollars
D. 250 Thousand dollars