$\"\"$

\

To use the formula s = r $\"\"$ .

\

First convert $\"\"$ in radian measure

\

= $\"\"$

\

= $\"\"$

\

$\"\"$

\

$\"\"$

\

Then r = 9 feets and $\"\"$

\

use the formula s = r $\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ $\"\"$

\

The solution is 18.857 feets.