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The half life of a certain substance is 21 years. How long will it take for a sample of this substance to decay to 88% of its original amount?
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Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary
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1) prove that 731^3β631^3 is divisible by 100 2) prove that 99^3β74^3 is divisible by 25
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The half life of a certain substance is 21 years. How long will it take for a sample of this substan...
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