To find the distance left to get to Bloomsfield after 3 1/2 hours of traveling, we need to evaluate the function \( D(h) \) at \( h = 3.5 \).
The function given is:
\[ D(h) = 440 - 65h \]
Now we substitute \( h = 3.5 \):
\[ D(3.5) = 440 - 65(3.5) \]
Calculating \( 65(3.5) \):
\[ 65 \times 3.5 = 227.5 \]
Now we can substitute this value back into the equation:
\[ D(3.5) = 440 - 227.5 \]
Finally, we perform the subtraction:
\[ D(3.5) = 440 - 227.5 = 212.5 \]
Therefore, the distance left to get to Bloomsfield after 3 1/2 hours of traveling is \( \boxed{212.5} \) miles.