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Mathematics>Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

A circle in the x y-plane has its center at (-100,221) and a diameter of 17. Which of the following is an equation of the circle?

A.(x+100)^2+(y-221)^2=72.25
B.(x+100)^2+(y-221)^2=289
C.(x-100)^2+(y+221)^2=72.25
D.(x-100)^2+(y+221)^2=289

答案和解析

答案：A

解析：

Choice A is correct.