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What Is the Lifetime on the Main Sequence of a 2-Solar-Mass

Question 2

Multiple Choice

What is the lifetime on the main sequence of a 2-solar-mass star compared to the approximately 10-billion-year life of our Sun? Pick the best answer.

A) 1.8 × 10¹¹ years
B) 1.8 × 10¹⁰ years
C) 1.8 × 10⁸ years
D) 1.8 × 10⁶ years
E) 1.8 × 10³ years

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