Question 59191
We are given that {{{A = 6V^(2/3)}}} and that {{{A = 12}}}. 
We want to solve for V.
{{{12 = 6V^(2/3)}}} or {{{2 = V^(2/3)}}}.
Raise both sides to the 3/2 power.
Then, {{{2^(3/2) = V}}}
This is equivalent to {{{sqrt(2^3) = V}}}.
So, {{{V = sqrt(8)}}} or {{{ V = sqrt(4*2)}}} or {{{V = 2sqrt(2)}}}.