If the values for both mass and volume double, the value of the density will be?

Stays the same.

Explanation:

Density = mass/volume

So if :

M/V = D

And if we were to double mass(M) and volume (V)

2M/2V = D

It will stay the same because the 2 and 2 would cancel out and we'd get the same density as the original value.

so whats the answer

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.