Suppose you filled an empty 2 liter pepsi bottle with air at sea level and capped it and suppose you did the same thing on top of the tall mountain which is the two bottles would have a higher density?

Hope this helps,

The bottle at sea level will be denser because air at sea level is dense, the air on higher altitudes is thinner and has less density.

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;