The correct inequality that represents the number of hours Marquis wants to work is:
\( x \geq 20 \)
This means that Marquis wants to work at least 20 hours, which includes the possibility of working more than 20 hours as well. However, among the options you provided, the closest in terms of symbol usage is:
\( x \geq 20 \)
Make sure to use the correct symbol for "at least" which is \( \geq \).