1. ## Write An Equation

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.

2. Originally Posted by magentarita
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,

$V=\frac{4}{3}\pi r^3$

Multiply both sides by 3

$3V=4\pi r^3$

Divide by $4 \pi$

$\frac{3V}{4 \pi}=r^3$

Take cube root of both sides and use symmetric property of equality

$r=\sqrt[3]{\frac{3V}{4 \pi}}$

3. ## ok..........

Originally Posted by masters
Hello again,

$V=\frac{4}{3}\pi r^3$

Multiply both sides by 3

$3V=4\pi r^3$

Divide by $4 \pi$

$\frac{3V}{4 \pi}=r^3$

Take cube root of both sides and use reflexive property of equality

$r=\sqrt[3]{\frac{3V}{4 \pi}}$
Well-done as usual.