## Precalculus (6th Edition) Blitzer

$32\ ft$
Step 1. We are given $a=\frac{80}{2}=40, b=24$; thus $c=\sqrt {a^2-b^2}=\sqrt {40^2-24^2}=32\ ft$ Step 2. The distance between a person to the center is $c=32\ ft$