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Cobalt 60 has a half-life of about 5 years.
How many grams of 300 g sample will remain after 20 years?

1. 0.0625 g
2. 9.375 g
3. 18.75 g
4. 37.5 g

Respuesta :

dannielle
after 5 years ...150g
after 10 years..75 g
after 15 years...37,5
after 20 years...18,75 g
siddiks25

Answer:

3. 18.75

Step-by-step explanation:

took the test and got it correct

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