Question 1038277

A circular room has a floor surface area of 400π square feet. What is the radius of the circular floor? Show your work. What is the circumference of the circular floor? Show your work.
<pre>Radius: {{{highlight_green(matrix(1,2, 20, ft))}}}
Circumference: {{{highlight_green(matrix(1,5, 2 * pi * r, or, 2 * pi * 20, or, 40pi))}}}