How in the world do I do this problem on joint variation? Can anyone help me with this simple grade 12 math question on joint variation? I'm stuck, I'm the WORST at word problems.

Thanks!

Remember that in general "$F$ varies jointly as $x$ and $y$" means $F=kxy$ for some constant $k$. 
Here you have $q$ in place of $F$, $t$ in place of $x$, and $v^2$ in place of $y$. Can you figure it out from there?
