SOLUTION: The center of a circle is C(-3,1) and a point on the circle is P(5,-7). The length of the diameter is ___ A. 22.6 B. 11.3 C. 12.8 D. 6.4 HELP!

Algebra ->  Algebra  -> Roman-numerals -> SOLUTION: The center of a circle is C(-3,1) and a point on the circle is P(5,-7). The length of the diameter is ___ A. 22.6 B. 11.3 C. 12.8 D. 6.4 HELP!      Log On

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Question 39173: The center of a circle is C(-3,1) and a point on the circle is P(5,-7). The length of the diameter is ___
A. 22.6
B. 11.3
C. 12.8
D. 6.4

HELP!
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
the distance for the diameter is: 2%2Asqrt%28%28y-y%29%5E2%2B%28x-x%29%5E2%29
2%2Asqrt%28%281%2B7%29%5E2%2B%28-3-5%29%5E2%29
2%2Asqrt%28%288%29%5E2%2B%28-8%29%5E2%29
2%2Asqrt%28128%29
2%2811.3%29
22.6
The answer is (A).