Final answer:
The possible number of hours the student would need to work to have at least $350 of earnings remaining after buying the new pair of shoes is 44.42 hours or more.
Step-by-step explanation:
To determine the possible number of hours the student would need to work to have at least $350 of earnings remaining after buying the new pair of shoes, we need to set up an inequality. Let's say the number of hours the student works is represented by 'h'. The student earns $9.50 per hour, so the total earnings will be 9.50h. After buying the new pair of shoes that cost $72, the remaining earnings will be 9.50h - 72. The inequality to represent the situation is:
9.50h - 72 >= 350
To solve this inequality, we can add 72 to both sides:
9.50h >= 422
Now, divide both sides by 9.50 to isolate 'h':
h >= 44.42
Therefore, the possible number of hours the student would need to work to have at least $350 of earnings remaining after buying the new pair of shoes is 44.42 hours or more.