Answer:
c
20/40=

so you put it into ratio form 1:2
therfore 20 is the answer
Answer:
Black hole most massive and white dwarf least massive should be correct. It really just depends on the original size of the star and it's gravitational pull pre death.
Explanation:
Just what I learned over time. I would still do more research on the subject though.
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Unequal radiation on a sphere: more solar radiation on a unit area of earths surface near the equator than at the poles because of the more direct angle of incoming solar radiation.