9π square units (about 28.26 square units)
To get an exact answer, just represent pi with π. The formula for the area of a circle is πr^2, where r is the radius. In this case, since the radius is 3, the area is represented by π*3^2, or 9π.
Since pi is an infinite number, we can only estimate the area in this case. Let’s use 3.14 to represent pi. This makes our equation simply 9*3.14, which is 28.26.
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