Very important: "if necessary round answers to the nearwest tenth of a unit".
Just wondering did you attempt to draw this circle?
Answer:
Step-by-step explanation: please go through the attached file for detailed explanation .
Factorize the numerator as a difference of squares:

Then if
, the
factors will cancel:

so the answer is B.
The right answer is C. The set of all points in a plane that are a certain distance from a single point
The certain distance is called the <em>radius</em> and the single point is called the <em>center. </em>In this way, all points are a certain or, in other words, the same distance from the center. So, for the Standard Form of the Equation of a Circle we have that: