Please help me Im on a quiz Which is correct about combining two velocities that are in the exact same direction?

A. The larger on is divided by the smaller one.

B. The smaller one is subtracted from the other.

C. The larger one is the only one that counts. We don't use the smaller one.

D. They are added together.

Explanation:

(D)

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.

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