The U.S. population is approximated by the function $$P(t)=\frac{616.5}{1+4.02 e^{-0.5 t}}$$ where $P(t)$ is measured in millions of people and $t$ is measured in 30 -year intervals, with $t=0$ corresponding to $1930 .$ What is the expected population of the United States in $2020(t=3) ?$
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Step 1: Substitute $t=3$ into the population function $P(t)$. Show more…
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