Final answer:
The question appears to be misplaced within the context of physics or cosmology, addressing mAs changes for radiologic density instead of critical density or mass-energy density in the universe.
Step-by-step explanation:
The question seems to address a concept in radiologic science, particularly related to the changes in milliampere-seconds (mAs) required to alter the density in an X-ray image. However, based on the provided context which deals with mass-energy density, critical density, and Hubble's constant, it appears the question is more closely associated with astrophysics or physics in the context of cosmology. Given the detailed context, the question itself seems misplaced or potentially a typo, as it doesn't relate to space, the critical density of the universe, or any of the provided information about density as it pertains to gravity, mass, or the expansion rate of the universe.