Question: A main-sequence star is 6.1 times more massive than the Sun. Its luminosity is 560 times that of the Sun. If the Sun's main-sequence lifetime

A main-sequence star is 6.1 times more massive than the Sun. Its luminosity is 560 times that of the Sun. If the Sun's main-sequence lifetime is 10 billion years, how many years will this star live? years

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