What is 16000=4*pi*r3

What is 16000=4*pi*r3, what is r?

4 X 3.14159265358....X r X3 This is assuming you meant r3?

Then 16000/above answer(37.699.......)

Then r=424.413.....etc. But if you meant to write r^3, then that's a different calculation!. Then you would have 4 x pi x r^3=16000

Then 16000/(4xPi xr^3)=1,273.239...etc,

Or r^3=1,273.239  Then you take the logs of both sides

3 x log r=log 1,273,239

3 x log r=3.104910.....etc., =3.104910/3=1.034970.....etc.

So r=1.034970. Now remember this is a "Log" of r, so we must raise 10 to this power=10.838520....etc.

So r=10.838520