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Asked Feb 10, 2020
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The US Census in 2010 counted 308,745,538 people and there were 3,999,386 births that year.

1.) compute the ratio of births to population and scale the second quantity to 1,000. 

2.) This rate is 3% lower than the 2009 birth rate. Give one possible explanation why the rate is lower given that the population grew.

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