The volume of any spherical balloon can be found by using the formula V = (4/3) (pi)(r^3).
Write an equation for r in terms of V and pi.
Hello again,
$\displaystyle V=\frac{4}{3}\pi r^3$
Multiply both sides by 3
$\displaystyle 3V=4\pi r^3$
Divide by $\displaystyle 4 \pi$
$\displaystyle \frac{3V}{4 \pi}=r^3$
Take cube root of both sides and use symmetric property of equality
$\displaystyle r=\sqrt[3]{\frac{3V}{4 \pi}}$