To determine the total number of hours \( h \) that Cooper will volunteer, we need to calculate how many hours he will work over two weeks, given that he works 3.5 hours every day.
There are 14 days in two weeks (7 days per week × 2 weeks). Therefore, the total hours can be calculated as:
\[ h = \text{number of days} \times \text{hours per day} = 14 \times 3.5 \]
This can also be set up as an equation:
\[ h = 3.5 \times 14 \]
To put this into the form of the responses provided, we can rearrange the equation as:
\[ 3.5h = 14 \]
However, we need to find the correct representation from the given options. The correct choice that aligns with the total number of hours Cooper will volunteer is:
3.5h = 14.