The observable universe is just a fraction of the entire universe however they are both 13.7 bln yrs old (since they were created during the same Big Bang).
I am sorry I don't understand what you mean theologically however physics wise this is garbage.
I agree that the visible universe is but a fraction of the entire universe. (probably something like 1/infinity)
I agree that prophetic messages are not physics equations (or as you say physics wise to be "garbage"), however the equation I've gleaned from 2 Peter 3:8 is nothing of the sort. While working to understand this cosmological model, I discovered that it made predictions of the effects observed in the Pioneer anomaly before I even knew anything about the Pioneer anomaly.
That being said, this equation isn't garbage. If the light from the heavens begins to disappear like smoke due to the universe ripping itself apart within the next 25 years don't forget that I told you so.
I'm really not surprised by your reaction due to the fact that we have conflicting view points. (Mine being that of the unpopular literal Genesis aged universe.)
Perhaps I should simply concede that I like your speed of light equation and say no more. I truly believe that the one true God has inspired you to find this equation in Sura 32:5. May God continue to lead you in truth.

