Question

If the amount of air in a spherical balloon is 288 cu. in.,
what is the radius of the balloon?
a. 6 inches
b. 7.3 inches
c.72 inches

Answer 1

The amount of air translates to the volume of the sphere... so what is the formula for volume of a sphere?

Answer 2

I don't know, I don't understand this question at all

Answer 3

You dont know the volume of a sphere? :O

Answer 4

I am shocked cause I forgot it too :( xD

Answer 5

This is a remedial class for me. Im just trying to get done with it as fast as i can so i can graduate

Answer 6

I am just kidding, so yeah

Volume(V) of a sphere is \[V=\frac{ 4 }{ 3 }Pir^3\]

Answer 7

okay

Answer 8

V=288
So,
\[288=\frac{ 4 }{ 3 }\times \pi \times r^3\]
Pi=3.14 so just find r :)

Answer 9

Thank you!

Answer 10

Anytime :)

Answer 11

\[r^3=\frac{ 3 \times 288 }{ 4 \times 3.14 }\]
\[r^3=\frac{ 864 }{ 12.56 }=68.789\]

\[r=\sqrt[3]{789}=4.0973\]