Here are some simple equations that can be a life saver with this stuff :
vol of a sphere =
[tex] v = \frac{3}{4} \pi \: {r}^{3} [/tex]
Circumference =
[tex]2 \times \pi \times r[/tex]
sorry this might not be very helpful. I haven't don't this since last year. You basically have to work backwards. so plug in 972 for V and then do (3/4)×3.14.
then take the answer u got for ^^ and divide it by 2? not sure.
