Physics

Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 380 million kilometers and take 9.0 Earth years to orbit about a point midway between them. What is the mass of each?

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I've worked this over so many times, yet every answer seems off. Right now, I want to say it's 1.604 x 10^28, but I've only got two more chances to submit.

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asked by John

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