To find out how many hours Maria still needs to spend, you can start with her total required hours, which is \(5 \frac{1}{2}\) hours, and then subtract the hours she has already completed, which is \(3 \frac{3}{4}\) hours.
The correct equation to determine the number of hours \(h\) that Maria still needs to spend is:
\[ h + 3 \frac{3}{4} = 5 \frac{1}{2} \]
This equation states that if you add the hours she has already completed (\(3 \frac{3}{4}\)) to the hours she still needs to complete (\(h\)), it will equal the total hours required (\(5 \frac{1}{2}\)).
So the correct response is:
h + 3 3/4 = 5 1/2.