$\"\"$

A football is in the shape of a prolate spheroid, which is simply a solid obtained by rotating

an ellipse $\"\"$ about its major axis.

Length of the NFL football averages $\"\"$ .

Center circumference is $\"\"$ .

The volume of a prolate spheroid is $\"\"$ .

Since the length of the football is $\"\"$ , $\"\"$ .

$\"\"$ .

Now calculate the volume of the football by substituting the values of $\"\"$ in the formula $\"\"$ .

$\"\"$

The football contains $\"\"$ air.

$\"\"$

The football contains $\"\"$ air.