As the highest car sits 166 feet off the ground. the radius of the circle is equal to the difference between that heigth and the center of the ferris:
[tex]\begin{gathered} r=166ft-85ft \\ \\ r=81ft \end{gathered}[/tex]
The radius is 81 feet
The lowest a cat will sit is the difference between the center of the circle and the radius:
[tex]85ft-81ft=4ft[/tex]
The lowest a car will sit on the Ferris wheel is 4ft
