hello1555
20.05.2021 •
Mathematics
The half-life of a certain isotope of strontium is 25 years. How much
of this strontium will remain after 100 years if the initial amount is
4.0 g?
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Ответ:
4x² = 60 * 15
x² = 60 * 15 / 4 = 15 * 15 = 225
x = 15, -15
Hope it helps!