Answer:
D. 
Step-by-step explanation:
To write the equation of a circle, use the formula
where the center of the circle is (h, k).
This means the equation is
.
Find the radius r by finding the distance between (3,2) and (-6,-4) using the distance formula.

Since the radius is √117 and therefore
.
The equation is
.
If the ones digit is "d", the number is (d+4)(2(d+4))(d), and the sum of digits is 4d+12 = 12. Then d=0.
The number is 480.
Answer:
9.13889
Step-by-step explanation:
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