The area of a circle is $49\pi$ square units. What is the radius of the circle, in units?
Let's call the radius of the circle $r$. We can use the formula for the area of a circle to find the value of $r$. The area of a circle is $pi * r^2$. And we know the area is $49pi$. So, we can write the equation $pi * r^2 = 49pi$ Dividing both sides of the equation by $pi$ gives $r^2=49$. Therefore, $r=7$ units.

