Answer:
30
Step-by-step explanation:
[tex]2 - 6c \leqslant - 28 \\ - 6c \leqslant - 28 - 2 \\ - 6c \leqslant - 30 \\ divide \: both \: side \: by \: - 6 \\ c \geqslant \frac{ - 30}{ - 6} \\ c \geqslant 5[/tex]