Answer:
A) 
Step-by-step explanation:
The equation of a circle is
where
is the center and
is the radius. If
and
, then:

Therefore, the equation of the circle is 
Answer:
Solve what?
Step-by-step explanation:
You didn't put the question.
Answer:
Step-by-step explanation:
Move the decimal to the left once on both of them and time the numbers together