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  3. 4 the spread of a virus through a city is...

Question: 4 the spread of a virus through a city is...

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4. The spread of a virus through a city is modeled by the function 0.5 t N- 15000/100 e5 ] where N is the number of people infected by the virus after t days. How many days it takes for 1,000 people of this city to be infected with the virus? (approximate your answer to2 decimal places). 5. The US DP growth rate for 2007-2017 is reported on the following chart. Determine the consecutive three year period between 2007 and 2017 with the largest growth rate. Develop a model to predict the US DP growth rate for December 31, 2020 Date Dec 31, 2017 Dec 31,2016 Dec 31,2015 Dec 31, 2014 Value 4.49% 3.40% 2.89% 4.42% Dec 31, 2012 3.56 Dec 31, 201 1 3.65% Dec 31.2010 4.19% Dec 31, 2009 0.47% Dec 31, 2008 ,0.83% Dec 31, 2007 459% 6. The relative intensity of an earthquake is a measurement of ground movement. The magnitude of an earthquake is the logarithm of relative intensity. The largest earthquake ever recorded was in Valdivia, Chile in 1960 with a relative intensity of 3162277660. Determine its magnitude.
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