Answer:
A
Step-by-step explanation:
The area of a circle is given by the formula:

Where <em>A</em> is the area and <em>r</em> is the radius.
Since we already know the area, we can plug it in and solve for <em>r</em>. Thus:

Divide both sides by π. We can use 3.14 as an approximation. The πs on the right cancel out:

Take the square root of each side:

The squares on the left cancel. The root of 576 is 24:

Therefore, the radius is 24.