Although it may seem obvious from the diagram of rectangle ABCD pictures triangle DMC is isosceles explain why this must be true
1 answer:
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<span>The half-life of helium-5 is 7.6 × 10^{-22} seconds, and the half-life of helium-9 is 7 × 10^{-21} seconds.
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Approximately
the half-life of helium-9 is greater <span>than that of helium-5.</span>
Answer: 9 times.
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Approximately
Answer: 9 times.