Verified Answer :

it's c, because
s=13
3s=3*13↪39

Answer:

\(\left[\begin{array}{ccc}2&90&10\\4&3&6\\1\left \{ {{y=32\int\limits^8_4 {x} \, dx } \atop {x=50}} \right. &8&6\end{array}\right] \\\\\\\\\\ x_{123} \frac{x}{y} \\\\=(C.39)\)

hope i helped