Jake walks to the taco's place for lunch. He walked 1 km east and stopped to pin his location. Then he continued for 2 km west to get to the pizza place. What distance did he cover?What was his displacement?

Distance 3 km, Displacement -1 km west

Explanation:

Assuming he is starting at 0 and walking 1 km east, then walks 2 km west, that would be 1 -2 because he walked in the opposite direction and was 1 kmfrom his staring point.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.