Approximately how long does it take a sample of francium-223 to decay by 50%?

1 answer:

6 0

B. 100 minutes correct me if i’m wrong

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bulgar [2K]

They would have had $50 at the beginning

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aksik [14]

$\left \{ {{y=x} \atop {y=2x-11}} \right. \\x=2x-11\\x=11\\\\y=x\\y=11\\\\\\Answer: (11;11)$

P.S. Hello from Russia :^)

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NISA [10]

Answer:

honors

Step-by-step explanation:

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Roman55 [17]

The only values a cosine can have are from -1 to 1.

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igor_vitrenko [27]

Answer:

3^(n+1) - 3^n / 3^(n-1) = 6

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3 years ago