Question

WILL MARK BRAINLIEST!!!!

Answer 1

Answer:

$20\pi$

Step-by-step explanation:

Let the radius of the disk be r centimeters. Since the area of the disk is 100pi sq cm, we have $\pi r^2=100\pi$, and since r is positive, $r=10.$ The circumference of a circle is $2\pi r$, which, in this case, is $\boxed{20\pi}$.