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OpenStudy (anonymous):
The half-life of a radioactive isotope is 4 days. If 28.2 kg are present, how much will be present after 26 days?
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OpenStudy (anonymous):
\[\huge 28.2\times \left(\frac{1}{2}\right)^{\frac{26}{4}}\] and a calculator
OpenStudy (anonymous):
0.31
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