To determine the number of hours, \( h \), that Maria still needs to spend, we need to set up the equation based on her total required hours and the hours she has already completed.
Maria needs to complete a total of \( 5 \frac{1}{2} \) hours. Last week, she completed \( 3 \frac{3}{4} \) hours.
The equation to find the remaining hours \( h \) can be set up as:
\[ h + 3 \frac{3}{4} = 5 \frac{1}{2} \]
This matches the response:
h plus 3 and three-fourths equals 5 and one-half.
So the correct choice is:
h + 3 3/4 = 5 1/2.