# microSam

\begin{aligned}
S(x)=
\begin{cases}
-4x+31 &\text{if} &0≤x≤12 \\
295 &\text{if} &12<x≤20\\
\frac{3}{4}x+278.5&\text{if} &20<x≤30\\
\frac{3}{2}x+404&\text{if} &30<x<40\\
\end{cases}
\end{aligned}