The answer is D. This is because when you take 10.65 and subtract 9.95 from it you get 0.07. If you take this number and continuously add to 9.95 you get the numbers provided in the chart. We'll also notice that the 0.07 is only added after 10 minutes of talking (10,20,30,etc.).
<span>D) perpendicular bisector <em>I believe.
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The standard form of a circle is:

Your center is
and your radius is 
Plug them into the equation and you get


The correct answer is D.
1,200 because 4x 3 is 12 and 40 x 30=1,200