## Act 1

1. How long will it take to air up the mattress?

2. Write down a guess.

## Act 2

3. What information would be useful to figure this out?

4. Write down some questions you have in your head right now.

## Act 3

## Sequel

5. What would happen if the mattress was half as tall?

6. What would happen if the pump speed was half as fast?

7. Design a mattress that would take half as long to fill. (Andrew Stadel)

**Common Core Standards**

G-GMD.3

Use volume formulas for cylinders, pyramids, cones, and spheres to solve problems.

**TEKS**

G.11(D)

apply the formulas for the volume of three-dimensional figures, including prisms, pyramids, cones, cylinders, spheres, and composite figures, to solve problems using appropriate units of measure

**Credit:** Coleman, Andrew Stadel, Dr. Clayton Edwards