Need explanation!!!

\f7. The concentration of a toxic chemical in a spring-fed lake is given by the equation: c(x) = - 50x x' + 3x+6 -, Where c is given in grams per liter and x is the time in days. (a) Determine when the concentration of the chemical is 6.16 g/L (3 marks) (b) What will the concentration of toxic chemical in the lake be over a long period of time? (1 mark) 8. Sketch the curve / (x) = = 12x -48 x - 2x -24 by providing a full analysis of its features: (10 marks) x-intercept(S): y-intercept(s): Vertical Asymptote(s): Horizontal Asymptote(s): End behaviour near Horizontal Asymptotes: As X-00, y-> x As X 00, y End behaviour near Vertical Asymptotes: Show your work below