Discover Questions

Isn't Hubble Constant of 15 km/million ly really average,moving time expansion levels of the Universe to 20 billion years time potential? Is the age of the Universe measured by Hubble constant really a time potential level of space which Einstein equation shows as Space time? Is it possible for chloroplasts to be denatured naturally? Like without human impact? If so under what circumstances? THANKS? If a gun at the top of a tower shot a bullet and dropped at the same time, which one would drop to the ground first? Please who can solve this with workings well detailed
45 = ar^2
105 = ar^4
It should be simultaneous equation?