Aurora, Nevada, was a mining boomtown in the 1860s and 1870s. Its population can be modeled as S-7.91t + 120.96t2 + 193.92t – 123.21 ( 45,544(0.8474) when 0.7 < t< 13 p(t) = %3D when 13 < t< 55 where p is measured in people and rate-of-change function -23.73t2 + 241.92t + 193.92 when 0.7

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