[" A sample of radio active substance ha...

[" A sample of radio active substance has "10^(6)" radioactive nuclei.It's half-life is "20" sec.How many "],[" nuclei will remain after "10" seconds? "],[[" 1) "7times10^(5)," 2) "8.5times10^(5)," 3) "8times10^(5)," 4) "7.5times10^(5)]]

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[" A sample of radio active substance has "10^(6)" radioactive nuclei.It's half-life is "20" sec.How many "],[" nuclei will remain after "10" seconds? "],[[" 1) "7times10^(5)," 2) "8.5times10^(5)," 3) "8times10^(5)," 4) "7.5times10^(5)]]

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