1. How many Tennis Balls will fit in Mr. Pittman’s Room?
By Mr. Pittman

2. Assumptions How big is Mr. Pittman’s room? How big is a tennis ball?
About 30 feet by 30 feet by 10 feet
How big is a tennis ball?
About 3 inch diameter

3. Rough Estimate Volume of Mr. Pittman’s Room: Volume of Tennis Ball:
30*12=360 inches
10*12=120 inches
360*360*120=15,552,000 cubic inches
Volume of Tennis Ball:
4 3 𝜋 𝑟 3 = =14.13 cubic inches

4. Rough Prediction Tennis Balls in Mr. Pittman’s Room
=1,100,636.94
I will be able to fit 1,100,636 tennis balls in Mr. Pittman’s room.
I rounded down because I only care about complete tennis balls in the room.

5. Research How big is Mr. Pittman’s room: Tennis ball:
25 feet by 30 feet by 9 feet
I used a measuring stick to determine the size of the room.
(25*12)*(30*12)*(9*12)=11,664,000 cubic inches
Tennis ball:
Diameter of a tennis ball is between 2.57 and 2.70 inches.
4 3 𝜋 𝑟 3 = (1.285) 3 = cubic inches
4 3 𝜋 𝑟 3 = (1.35) 3 = cubic inches

6. Researched predictions
Tennis Balls in Mr. Pittman’s Room
=1,313,015.22
=1,132,342.53
I will be able to fit 1,132,242-1,313,105 tennis balls in Mr. Pittman’s room, depending on the size of the ball.

7. Comparing Predictions
Rough Prediction: 1,100,636 tennis
Researched Prediction: 1,132,242-1,313,105 tennis balls
I overestimated the size of the room.
I overestimated the size of the tennis ball.