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Approximately What Fraction of the Sun's Main-Sequence Lifetime Has Been

Question 43

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Approximately what fraction of the Sun's main-sequence lifetime has been completed at the present time? (See Table 19-1 of Universe, 11th ed.)
​
Approximately what fraction of the Sun's main-sequence lifetime has been completed at the present time? (See Table 19-1 of Universe, 11th ed.) ​ ​ A) less than 10% B) about 3/4 C) about 1/4 D) about 1/2 ​


A) less than 10%
B) about 3/4
C) about 1/4
D) about 1/2

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