Slipknot Slipknot

30-11-2017
Biology

contestada

If a radioactive substance's half-life is 20 years, how much of a 40-gram sample will be left after 60 years?
A. 5 grams
B. 10 grams
C. 20 grams
D. 30 grams

Respuesta :

Nrr1313 Nrr1313

30-11-2017

20 is your answer
hope this helps

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namekianball4 namekianball4

05-12-2018

The answer is C. 20 grams.

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