Density = mass/volume
X = 10/50
X=.2
I looked up your question just now and found this sight that has plenty of answers in it. https://www.britannica.com/place/Appalachian-Mountains
Hope this helps.
<span>It's asking what people would do if the ocean had favorable conditions as in going to swim, sitting on the beach.
It offers them something to do ( a sport). </span>
The answer is two double bonds
If they’re separated by only one single bond there said to be contracted