### Home > CCG > Chapter 9 > Lesson 9.1.4 > Problem9-45

9-45.

Koy is inflating a spherical balloon for her brother’s birthday party. She has used three full breaths so far and her balloon is only half the width she needs. Assuming that she puts the same amount of air into the balloon with each breath, how many more breaths does she need to finish the task? Explain how you know. Homework Help ✎

If she needs the balloon to double in width, what happens to volume? How does the volume grow?

How many breaths are needed to fill the balloon?

Volume increases by $2^3\text{ or }8$ times. $3(8)=24$ total breaths needed. She needs $21$ more breaths $(24 − 3)$.