While backpacking today, mia climbed up 985 ft to the peak of the mountain and then climbed down 320 ft to a campsite. if she started at an elevation of 4,579 ft this morning, what was the elevation of her campsite?

She started at an elevation of 4579, and she climbed 985, therefore, you need to add these together
4579+985= 5548
Then she climbed back down 320ft to the campsite, this means that you have to subtract this from the original number, and you will then have the eevation of the campsite.
5548-320= 5528
Therefore, the elevation of the camp is 5528ft
Hope this helps :) 

C. i possibility the answer to this