and range

It would be more or less the same as if congress raised the debt ceiling by 50T or got rid of it entirely. Not a whole lot would happen unless congress also authorized the Treasury to spend all that money.

Yeah the differences are so small that if the y axis started at 0 all the details on the graph would become too small to see.

We use the word flat because we haven't got a specific word for 3D nor a general word to use so we use the closet one available which is 'flat' a word traditionally for 2D. Not curved/a curvature of 0, might be a less confusing way to describe the universe.

A similar issue arises when talking about 'size' in higher dimensions. An object in 1D is a line and its size is called length, in 2D you have a surface with an area, in 3D your object has a volume.

But in 4D we haven't got a unique name for its size and call it volume again. and it doesn't help that like every 3D object has a 2D surface area, a 4D object has a 3D volume. Therefore every 4D object has two measurements called volume (though its specified surface or interior volume).

And get gets worse as you go up in dimensions because every dimension you go up you get an additional type of volume to consider but the highest dimension measurement is usually considered its size.

TLDR: dimensions are confusing and we haven't got enough words in english to properly or easily talk about it.

Its called WORM storage most common is probably DVD-R but some types of magnetic is longer lasting . There's also distributed self stabilization storage.