No one because the volume of a sphere is 4/3*pi*radius cubed but it is only an estimation because the exact value of pi has never been found.
(pi)R2 is the formula for the area of a circle. It won't help you find the volumeof a half sphere, at least not without some calculus.What you need is the formula for the volume of a sphere: V = 4/3 pi R3 .Do I have to explain that the volume of a half sphere is just half of that ?
A sphere
Th answer would be 22222222.6687 wide
A 100 centimeters.
A sphere.
the meter.
It is 18 miles.
1 micro meter or 1 millionth of a meter or 1/1000 th of a millimeter - so pretty small
12 feet across.
7,050,000 Square kilo metres
panda