Demographics—Immigration and Greenhouse Gases: In his book Bleeding Hearts and Empty Promises: A Liberal Rethinks Immigration, Philip Cafaro, associate professor of philosophy at Colorado State University, claims that immigration to the United States has contributed to higher levels of greenhouse gas emissions. (Source: Center for Immigration Studies.) The amount of greenhouse gas emissions annually in the United States from 1990 to 2010 can be modeled by
f(x) = −3.39x2 + 122.44x + 5977 0 ≤ x ≤ 20
where x represents the number of years since 1990 and f(x) represents the amount of greenhouse gas emissions in millions of metric tons. (Source: Google Public Data.) The number of immigrants to the United States from 1990 to 2010 can be modeled by
g(x) = −0.03x + 1.42 0 ≤ x ≤ 20
where x represents the number of years since 1990, and g(x) represent the number of immigrants coming to the United States annually in millions. (Source: U.S. Census Bureau.)
(a) Form the function
, to measure the number of tons of greenhouse gasses in the United States per immigrant.
(b) Determine h′(x).
(c) Evaluate h′(2) and h′(17) and interpret each.
(d) Do the results in part (c) support the professor’s premise? Explain.
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