To evaluate the expression \(-12t - 17.1\) for \(t = 0.2\), substitute \(0.2\) for \(t\):
\[ -12(0.2) - 17.1 \]
First, calculate \(-12(0.2)\):
\[ -12 \times 0.2 = -2.4 \]
Now, substitute that back into the expression:
\[ -2.4 - 17.1 \]
Next, calculate \(-2.4 - 17.1\):
\[ -2.4 - 17.1 = -19.5 \]
Thus, the evaluated expression is:
\[ \boxed{-19.5} \]