Chapter 9: Problem 24
Find the indicated limit. \(\lim _{x \rightarrow-2}-3\)
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Chapter 9: Problem 24
Find the indicated limit. \(\lim _{x \rightarrow-2}-3\)
These are the key concepts you need to understand to accurately answer the question.
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Suppose \(F(x)=g(f(x))\) and \(f(2)=3, f^{\prime}(2)=-3\), \(g(3)=5\), and \(g^{\prime}(3)=4\). Find \(F^{\prime}(2)\)
A city's main well was recently found to be contaminated with trichloroethylene, a cancer-causing chemical, as a result of an abandoned chemical dump leaching chemicals into the water. A proposal submitted to the city's council members indicates that the cost, measured in millions of dollars, of removing \(x \%\) of the toxic pollutant is given by $$ C(x)=\frac{0.5 x}{100-x} $$ Find \(C^{\prime}(80), C^{\prime}(90), C^{\prime}(95)\), and \(C^{\prime}(99)\). What does your result tell you about the cost of removing all of the pollutant?
AGING PoPULATION The population of Americans age \(55 \mathrm{yr}\) and older as a percentage of the total population is approximated by the function $$ f(t)=10.72(0.9 t+10)^{0.3} \quad(0 \leq t \leq 20) $$ where \(t\) is measured in years, with \(t=0\) corresponding to the year 2000 . At what rate was the percentage of Americans age 55 and over changing at the beginning of \(2000 ?\) At what rate will the percentage of Americans age \(55 \mathrm{yr}\) and older be changing in \(2010 ?\) What will be the percentage of the population of Americans age \(55 \mathrm{yr}\) and older in 2010 ?
Find the derivative of the function. \(f(t)=\frac{4 t^{2}}{\sqrt{2 t^{2}+2 t-1}}\)
AIR PURIFICATION During testing of a certain brand of air purifier, the amount of smoke remaining \(t\) min after the start of the test was $$ \begin{aligned} A(t)=&-0.00006 t^{5}+0.00468 t^{4}-0.1316 t^{3} \\ &+1.915 t^{2}-17.63 t+100 \end{aligned} $$ percent of the original amount. Compute \(A^{\prime}(10)\) and \(A^{\prime \prime}(10)\) and interpret your results. Source: Consumer Reports
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