Jawabanmu

Jawaban paling cerdas!
2014-09-09T00:04:12+07:00
Waktu paruh =  800 thaun m=1/2 mo = 5

 5=10 .  e^{k .800} ..... 1= 2  e^{k .800}

ln 1 = ln 2 + ln  e^{k .800}
0=ln 2 + 800 k ..... k= -ln2 /800

m500 = 10  e^{ - ln2/800 .500}
         = 10  e^{ -5/8 , ln2}


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