How can you find all of
the dimensions of a rectangle prism with the given volume

You can't.  Knowing the volume doesn't tell you the dimensions. 
There are an infinite number of different rectangular prisms, all
with different dimensions, that all have the same volume.

Here's an example.  Let's say I have a rectangular prism and its
volume is 64.

The dimensions could be . . .

1 x 1 x 64
1 x 2 x 32
1 x 4 x 16
1 x 8 x 8
2 x 2 x 16
2 x 4 x 8
4 x 4 x 4 .

If I only tell you the volume, there is no way to figure out the dimensions.
 

It’s 24.6 after you round to the nearest tenths the answer should be 25.0