The concentration $C(x)($in $\frac{g}{mL})$ of a certain chemical $x$ minutes after a reaction is approximated by the following equation.

$C(x)=\frac{3x^2-11x+40}{x^2-4x+8}$

Complete the following.

$($a$)$ Use the ALEKS graphing calculator to find the value of $x$ that maximizes the concentration. Then give the maximum concentration. Round your answers to the nearest hundredth.

Value of $x$ that maximizes concentration: $$ minutes

Maximum concentration: $\frac{g}{mL}$

$($b$)$ Complete the following sentence.

For very large $x,$ the concentration appears to

undefined