This is the problem:
"A mountain climber is at an elevation of $10,000$ feet. If she descends $2,000$ feet a day, which equation would be used to show how many days it will take to reach sea level ($0$ feet)?"

My online school says the problem looks like this; $10,000 ÷ 2,000$
but I thought it should be $-2,000$ since climber is descending. 

The online teacher said this, "It would not be a negative number since we are given $10,000$ feet and $2,000$ each day. This answer is correct."