[ot][ot][ot][personal] whirligig small thoughts

[Undescribed Horrific Abuse, One Victim & Survivor of Many]

so something we'll need for this whirligig is an expression for the
volume of a sphere, which i don't remember well. i think it has a
fraction with a 3 in the denominator, and it will have r cubed.

in little spots of confusion i've been thinking about solving for this formula.