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Question: Suppose the speakers in Exercise 13 are

Suppose the speakers in Exercise 13 are 4 meters apart and the sound intensity of one speaker is k times that of the other, as shown in the figure. To print an enlarged copy of the graph, go to MathGraphs.com. a. Find the equation of all locations (x, y) where one could stand and receive equal amounts of sound from both speakers. b. Graph the equation for the case k = 3. c. Describe the set of locations of equal sound as k becomes very large.
Suppose the speakers in Exercise 13 are 4 meters apart and the sound intensity of one speaker is k times that of the other, as shown in the figure. To print an enlarged copy of the graph, go to MathGraphs.com.
a. Find the equation of all locations (x, y) where one could stand and receive equal amounts of sound from both speakers.
b. Graph the equation for the case k = 3.
c. Describe the set of locations of equal sound as k becomes very large.


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> One of the fundamental themes of calculus is to find the slope of the tangent line to a curve at a point. To see how this can be done, consider the point (2, 4) on the graph of f(x) = x2 (see figure). a. Find the slope of the line joining (2, 4) and (3,

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