Find the average density of a red giant star with a mass of 20 × 1030 kg (approximately 10 solar masses) and a radius of 150 × 109 m (equal to the Earth's distance from the Sun).
A. 1.41 × 10?4 kg/m3
B. 0.007 kg/m3
C. 1.41 kg/m3
D. 710 kg/m3
E. 1.41 × 10?3 kg/m3
Answer: E
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