Chapter 3: Problem 14
Change each equation to its logarithmic form. Assume \(y>0\) and \(b>0\). $$10^{0}=1$$
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Chapter 3: Problem 14
Change each equation to its logarithmic form. Assume \(y>0\) and \(b>0\). $$10^{0}=1$$
These are the key concepts you need to understand to accurately answer the question.
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Graph \(f(x)=e^{x},\) and then sketch the graph of \(f\) reflected across the line given by \(y=x\)
Assuming that air resistance is proportional to velocity, the velocity \(v,\) in feet per second, of a falling object after \(t\) seconds is given by \(v=32\left(1-e^{-t}\right)\) a. Graph this equation for \(t \geq 0\) b. Determine algebraically, to the nearest 0.01 second, when the velocity is 20 feet per second. c. Determine the horizontal asymptote of the graph of \(v\) d. the horizontal asymptote in the context of this application.
Involve the factorial function \(x !\), which is defined for whole numbers \(x\) as $$ x !=\left\\{\begin{array}{ll} 1, & \text { if } x=0 \\ x \cdot(x-1) \cdot(x-2) \cdot \cdots \cdot \cdot 3 \cdot 2 \cdot 1, & \text { if } x \geq 1 \end{array}\right. $$ For example, \(3 !=3 \cdot 2 \cdot 1=6\) and \(5 !=5 \cdot 4 \cdot 3 \cdot 2 \cdot 1=120\) During the 30 -minute period before a Broadway play begins, the members of the audience arrive at the theater at the average rate of 12 people per minute. The probability that \(x\) people will arrive during a particular minute is given by \(P(x)=\frac{12^{x} e^{-12}}{x !} .\) Find the probability, to the nearest \(0.1 \%\) that a. 9 people will arrive during a given minute. b. 18 people will arrive during a given minute.
Data from Forrester Research suggest that the number of broadband [cable and digital subscriber line (DSL) \(]\) connections to the Internet can be modeled by \(f(x)=1.353(1.9025)^{x},\) where \(x\) is the number of years after January \(1,1998,\) and \(f(x)\) is the number of connections in millions. a. How many broadband Internet connections, to the nearest million, does this model predict will exist on January \(1,2005 ?\) b. According to the model, in what year will the number of broadband connections first reach 300 million? [Hint: Use the intersect feature of a graphing utility to determine the \(x\) -coordinate of the point of intersection of the graphs of \(f(x)\) and \(y=300.1\)
Use a graphing utility to graph each function. If the function has a horizontal asymptote, state the equation of the horizontal asymptote. $$f(x)=-e^{(x-4)}$$
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