MathTrig
posted by Megan .
solve for a: V=4/3pia^2b

MathTrig 
drwls
V = (4/3) pi a^2 b
This looks like an equation for the volume of an prolate spheroid. (They have the shape of a rugby ball). To solve for a, divide both sides of the equation by (4/3) pi b and then take the positive square root of both sides.
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