Joe, a hiker, stands at the top of a hill on a trail above the ocean. joe's friend dave is just starting out at the trailhead, which is at the beach. which statements about joe and dave are accurate? check all that apply.

answers are
1. joe is at a higher altitude than if he was at the beach.
2. the air joe is breathing is less dense than the air at sea level.
4. if joe keeps going up, air pressure will continue to decrease.

1, 2, 4 are accurate.

Explanation:

1. Joe is on a hill (on a trail) above the ocean. The beach and ocean are at similar altitudes. Therefore Joe is at a higher altitude than if he was at the beach.

2. Since Joe is on a hill, he has a higher altitude than at sea level. Air at a higher altitude has lower density because there is less air "ontop" of itself than at lower altitudes. As well, his hill is above the ocean, which means there is a lot of water, making the air more humid than where he is. Humidity also makes air denser.

4.The air pressure will decrease if Joe goes up to higher altitudes because there will be less air on top of itself.

the backbone of the dna and rna compound is sugar phosphate.

"a.) well–developed vascular system."