If the amount of air in a spherical balloon is 288π cu in., what is the radius of the balloon?

6 inches
7.3 inches
72 inches

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6in 
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Answer:

Radius of the balloon is 6 inches.

Step-by-step explanation:

We have been given that  amount of air in a spherical balloon is 288π cu in.

It means the volume of the spherical balloon is [tex]V=288\pi[/tex]

The volume of a sphere is given by

[tex]V=\frac{4}{3}\pi r^3[/tex]

On substituting the value, we get

[tex]288\pi=\frac{4}{3}\pi r^3[/tex]

Cancel π from both side

[tex]288=\frac{4}{3} r^3[/tex]

Solving the equation for r

[tex]r^3=\frac{288\times3}{4}\\\\r^3=216\\\\r=6[/tex]

Therefore, the radius of the balloon is 6 inches.