20. AIr The Mueprints at Addison Circle is a sculpture that took 18,000 wotker-hours to construct using over 410,000 pronds of steel. The picce of art is placed within a traffec circle with a diameter of 133 bet. Find the area of the circle. Round to the nearest tenth of a sgeare foot.

Step 1 ：The problem is asking for the area of a circle. The formula for the area of a circle is \(\pi r^2\), where r is the radius of the circle.

Step 2 ：The radius is half the diameter, so in this case, the radius is \(\frac{133}{2} = 66.5\) feet.

Step 3 ：Substitute the radius into the formula: \(\pi (66.5)^2\).

Step 4 ：The area of the circle is approximately 13892.908112337462 square feet.

Step 5 ：Round the area to the nearest tenth of a square foot to get \(\boxed{13892.9}\) square feet.