k=−1tln(NtNo)k=−12.00yrln(0.591.000)k=−12.00(−0.0481)=0.0241yr−1t12=0.693k=0.6930.0241=28.8yrk= -\frac{1}{t}\ln(\frac{N_t}{N_o})\\ k= -\frac{1}{2.00 yr}\ln(\frac{0.59}{1.000})\\ k= -\frac{1}{2.00}(-0.0481)=0.0241 yr^{-1}\\ t_{\frac{1}{2}}=\frac{0.693}{k}=\frac{0.693}{0.0241}=28.8 yrk=−t1ln(NoNt)k=−2.00yr1ln(1.0000.59)k=−2.001(−0.0481)=0.0241yr−1t21=k0.693=0.02410.693=28.8yr
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