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Alex777 [14]
3 years ago
7

The half-life of helium-5 is 7.6 × 10-22 seconds, and the half-life of helium-9 is 7 × 10-21 seconds. Approximately how many tim

es greater is the half-life of helium-9 than that of helium-5?
Mathematics
2 answers:
ozzi3 years ago
4 0
(7 × 10-21) / (<span> 7.6 × 10-22) = 9.21 times greater</span>
bearhunter [10]3 years ago
4 0

Answer C, 9 Times greater

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