Question
A common air pollutant responsible for acid rain is sulfur dioxide $\left(\mathrm{SO}_{2}\right) .$ Emissions of $\mathrm{SO}_{2}$ during year $x$ are computed by $f(x)$ in the table. Emissions of carbon monoxide (CO) are computed by $g(x)$ Amounts are given in millions of tons.$$\begin{array}{c|c|c|c|c|c}\boldsymbol{x} & 1970 & 1980 & 1990 & 2000 & 2010 \\\hline \boldsymbol{f}(\boldsymbol{x}) & 31.2 & 25.9 & 23.1 & 16.3 & 13.0 \\\hline \boldsymbol{g}(\boldsymbol{x}) & 204.0 &185.4 & 154.2 & 114.5 & 74.3\end{array}$$(a) Evaluate $(f+g)(2010)$(b) Interpret $(f+g)(x)$(c) Make a table for $(f+g)(x)$
Step 1
This means we need to find the values of $f(2010)$ and $g(2010)$ from the table and add them together. From the table, we see that $f(2010) = 13.0$ and $g(2010) = 74.3$. So, $(f+g)(2010) = f(2010) + g(2010) = 13.0 + 74.3 = 87.3$. Show more…
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