To determine the number of hours, \( h \), that Maria still needs to spend to complete her community service program, we can start by recognizing that she needs to complete a total of 512 hours. Since she has already completed 334 hours, we can find the remaining hours by setting up the equation:
\[ h + 334 = 512 \]
This equation states that the hours she still needs to spend (h) plus the hours she has already spent (334) equals the total required hours (512).
Thus, the correct response is:
h + 334 = 512