Which quality best describes a producer with an absolute advantage?
efficient
fast
accurate
prolific

The answer is efficient. This four qualities which are, efficient, fast, accurate, prolific are referring to one best quality which is for being very productive. Speaking of producer meaning is to produce plenty and it is 100% efficient, and it is an absolute advantage.

I'm pretty sure there's a geometry rule for   anyways, if the triangle is equilateral, and the circle is circumscribed, the circle is outside of the triangle.  to find the area, you need the radius.  the radius should be a straight line from the center of the triangle to any of it's points.  draw lines from the center of the circle to each of the triangle points.  draw three more lines from the center to the middle of the sides of the triangle.  you should now have six separate 30-60-90 triangles inside of your original triangle. use your 30-60-90 rules to solve for the radius, then the circumference.