1 the population of the ukraine fell from 457 million in, Ask an Expert

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1. The population of the Ukraine fell from 45.7 million in 2009 to 45.42 million in 2010.40 Assuming exponential decline, in what year is the population predicted to be 45 million?

2. Find the half-life of a radioactive substance that is reduced by 30% in 20 hours.

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