Answer
$[-4500, 10000]$
Work Step by Step
The volunteers received 10,000 USD, making the value $10000$. They spent 4500 USD, represented by $-4500$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.