math-volume

I'm confused with how to solve this problem, so help would be great!

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

All this is asking you to do is get r=something. First, I would divide both sides by 4/3, giving you:
3V/4 = pi r^3.
Then, divide each side by pi, giving you:
3V/4pi = r^3.
Then, cube-root each side, finally giving you:
cubedroot(3V/4pi) = r.

Multipy both sides of the equation by 3/4:
3V/4 = ð r^3
Divide each side by ð:
r^3 = 3V/4ð
Take the cube root of each side:
r = cube root(3V/4ð)

oh ok thanks. I thought I had to do more steps. thanks again for the help.

in above solution ð = pi

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