Question: Suppose the speakers in Exercise 13 are

> Find the sales necessary to break even (R = C) when the cost C of producing x units is C = 2.04x + 5600 and the revenue R from selling x units is R = 3.29x.

> The table shows the numbers of cell phone subscribers (in millions) in the United States for selected years. (Source: CTIA-The Wireless Association) Use the regression capabilities of a graphing utility to find a mathematical model of the form y = at2

> The table shows the Gross Domestic Product, or GDP (in trillions of dollars), for 2009 through 2014. (Source: U.S. Bureau of Economic Analysis) Use the regression capabilities of a graphing utility to find a mathematical model of the form y = at + b fo

> Use a graphing utility to find the points of intersection of the graphs of the equations. Check your results analytically. y = -│2x - 3│ + 6 y = 6 - x

> Use a graphing utility to find the points of intersection of the graphs of the equations. Check your results analytically. y = √x+6 y = √-x2 -4x

> Use a graphing utility to find the points of intersection of the graphs of the equations. Check your results analytically. y = x4 − 2x2 + 1 y = 1 − x2

> Find any intercepts. y = x2 − 8x + 12

> Use a graphing utility to find the points of intersection of the graphs of the equations. Check your results analytically. y = x3 − 2x2 + x – 1 y = −x2 + 3x – 1

> Find the points of intersection of the graphs of the equations. x2 + y2 = 16 x + 2y = 4

> Find the points of intersection of the graphs of the equations. x2 + y2 = 5 x – y = 1

> Describe how to find the x- and y-intercepts of the graph of an equation.

> Find the points of intersection of the graphs of the equations. x = 3 − y2 y = x – 1

> Find the points of intersection of the graphs of the equations. x2 + y = 15 −3x + y = 11

> Find the points of intersection of the graphs of the equations. 3x − 2y = −4 4x + 2y = −10

> Find the points of intersection of the graphs of the equations. x + y = 8 4x − y = 7

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. x2 + 4y2 = 4

> Find any intercepts. y = 5x – 8

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. 3y2 – x = 9

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = │6 − x│

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = 6 − │x│

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = 10 /(x2 + 1)

> find the domain and range of the function. g(x) = x2 − 5

> Let R be the region consisting of the points (x, y) of the Cartesian plane satisfying both ∣x∣ − ∣y∣ ≤ 1 and ∣y∣ ≤ 1. Sketch the region R and find its area.

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = 8 / x

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. x = y4 - 16

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. x = y3

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = √25 – x2

> Find any intercepts. y = x√16 – x2

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = x √x + 5

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = x3 – 4x

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = x3 + 2

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = 2x2 + x

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = 9 - x2

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = (2/3)x + 1

> Find the domain and range of the function. f(x) = 4x2

> Find any intercepts and test for symmetry. Then sketch the graph of the equation. y = 2 − 3x

> Test for symmetry with respect to each axis and to the origin. │y│ - x = 3

> Let d1 and d2 be the distances from the point (x, y) to the points (−1, 0) and (1, 0), respectively, as shown in the figure. Show that the equation of the graph of all points (x, y) satisfying d1d2 = 1 is (x2 + y2)2 = 2(x2 âˆ

> The function y = ½ sin 2x has an amplitude that is twice that of the function y = sin x.

> Test for symmetry with respect to each axis and to the origin. y = │x3 + x│

> Test for symmetry with respect to each axis and to the origin. y = x5 / 4-x2

> Prove that the function is even. f(x) = a2nx2n + a2n-2x2n−2 + . . . + a2x2 + a0

> Prove that the function is odd f(x) = a2nx2n + a2nx2n-2 + . . . + a3x3 + a1x

> Use a graphing utility to graph the polynomial functions p1(x) = x3 − x + 1 and p2(x) = x3 − x. How many zeros does each function have? Is there a cubic polynomial that has no zeros? Explain

> The horsepower H required to overcome wind drag on a certain automobile is H(x) = 0.00004636x3 where x is the speed of the car in miles per hour. a. Use a graphing utility to graph H. b. Rewrite H so that x represents the speed in kilometers per hour. [

> Water runs into a vase of height 30 centimeters at a constant rate. The vase is full after 5 seconds. Use this information and the shape of the vase shown to answer the questions when d is the depth of the water in centimeters and t is the time in second

> An electronically controlled thermostat is programmed to lower the temperature during the night automatically (see figure). The temperature T in degrees Celsius is given in terms of t, the time in hours on a 24-hour clock. Approximate T(4) and T(15).

> Determine whether the function f(x) = 0 is even, odd, both, or neither. Explain.

> Does the degree of a polynomial function determine whether the function is even or odd? Explain.

> Give an example of functions f and g such that f ∘ g = g ∘ f and f(x) ≠ g(x).

> Test for symmetry with respect to each axis and to the origin.

> Can the graph of a one-to-one function intersect a horizontal line more than once? Explain.

> Find all values of c such that the domain of f(x) = x + 3 / x2 + 3cx + 6

> Find the value of c such that the domain of f(x) = √c − x2 is [−5, 5].

> A person buys a new car and keeps it for 6 years. During year 4, he buys several expensive upgrades. Consider the value of the car as a function of time.

> A student commutes 15 miles to attend college. After driving for a few minutes, she remembers that a term paper that is due has been forgotten. Driving faster than usual, she returns home, picks up the paper, and once again starts toward school. Consider

> The height of a baseball as a function of horizontal distance during a home run

> Sketch a possible graph of the situation. The speed of an airplane as a function of time during a 5-hour flight

> A large room contains two speakers that are 3 meters apart. The sound intensity I of one speaker is twice that of the other, as shown in the figure. (To print an enlarged copy of the graph, go to MathGraphs.com.) Suppose the listener is free to move abou

> Write an equation for a function that has the given graph. The bottom half of the circle x2 + y2 = 36

> Write an equation for a function that has the given graph. The bottom half of the parabola x + y2 = 0

> Test for symmetry with respect to each axis and to the origin. xy − √4 – x2 = 0

> Write an equation for a function that has the given graph. Line segment connecting (3, 1) and (5, 8)

> Write an equation for a function that has the given graph. Line segment connecting (−2, 4) and (0, −6)

> Determine whether the function is even, odd, or neither. Then find the zeros of the function. Use a graphing utility to verify your result. f(x) = 4x4 − 3x2

> Determine whether the function is even, odd, or neither. Then find the zeros of the function. Use a graphing utility to verify your result. f(x) = 2 6√x

> Determine whether the function is even, odd, or neither. Then find the zeros of the function. Use a graphing utility to verify your result. f(x) = ∛x

> Determine whether the function is even, odd, or neither. Then find the zeros of the function. Use a graphing utility to verify your result. f(x) = x2 (4 − x2 )

> Explain how you would graph the equation y + ∣y∣ = x + ∣x∣. Then sketch the graph.

> The domain of the function f shown in the figure is −6 ≤ x ≤ 6. a. Complete the graph of f given that f is even. b. Complete the graph of f given that f is odd.

> The graphs of f, g, and h are shown in the figure. Decide whether each function is even, odd, or neither.

> Find the coordinates of a second point on the graph of a function f when the given point is on the graph and the function is (a) even and (b) odd. (4, 9)

> Test for symmetry with respect to each axis and to the origin. y = 4 − √x+ 3

> Find the coordinates of a second point on the graph of a function f when the given point is on the graph and the function is (a) even and (b) odd. (-3/2, 4 )

> F(x) = f ∘ g ∘ h. Identify functions for f, g, and h. (There are many correct answers.) F(x) = 1 / 4x6

> F(x) = f ∘ g ∘ h. Identify functions for f, g, and h. (There are many correct answers.) F(x) = √2x − 2

> A pebble is dropped into a calm pond, causing ripples in the form of concentric circles. The radius (in feet) of the outer ripple is given by r(t) = 0.6t, where t is the time in seconds after the pebble strikes the water. The area of the circle is given

> Use the graphs of f and g to evaluate each expression. If the result is undefined, explain why. a. ( f ∘ g)(3) b. g(f(2)) c. g(f(5)) d. (f ∘ g)(−3) e. (g &

> Let f(x) = 1/ 1-x. a. What are the domain and range of f? b. Find the composition f( f(x)). What is the domain of this function? c. Find f( f( f(x))). What is the domain of this function? d. Graph f( f( f(x))). Is the graph a line? Why or why not?

> Find the composite functions f ∘ g and g ∘ f. Find the domain of each composite function. Are the two composite functions equal? f(x) = 1/x g(x) = √x + 2

> Find the composite functions f ∘ g and g ∘ f. Find the domain of each composite function. Are the two composite functions equal? f(x) = 3/x g(x) = x2 − 1

> Find the composite functions f ∘ g and g ∘ f. Find the domain of each composite function. Are the two composite functions equal? f(x) = x2 – 1 g(x) = −x

> Find the composite functions f ∘ g and g ∘ f. Find the domain of each composite function. Are the two composite functions equal? f(x) = x2 g(x) = √x

> Test for symmetry with respect to each axis and to the origin. xy2 = −10

> Given f(x) = 2x3 and g(x) = 4x + 3, evaluate each expression. a. f(g(0)) b. f (g( 1 2)) c. g(f(0)) d. g( f (−1 4)) e. f(g(x)) f. g( f(x))

> Given f(x) = √x and g(x) = x2 − 1, evaluate each expression. a. f(g(1)) b. g(f(1)) c. g(f(0)) d. f(g(−4)) e. f(g(x)) f. g(f(x))

> Find (a) f (x) + g(x), (b) f (x) − g(x), (c) f (x) ● g(x), and (d) f (x) g(x). f(x) = x2 + 5x + 4 g(x) = x + 1

> Find (a) f (x) + g(x), (b) f (x) − g(x), (c) f (x) ∙ g(x), and (d) f (x) g(x). f(x) = 2x – 5 g(x) = 4 − 3x

> Sketch the graph of the function f(x) = √x and label the point (4, 2) on the graph. a. Find the slope of the line joining (4, 2) and (9, 3). Is the slope of the tangent line at (4, 2) greater than or less than this number? b. Find the slope of the line j

> Use the graph of f shown in the figure to sketch the graph of each function. To print an enlarged copy of the graph, go to MathGraphs.com. a. f(x − 4) b. f(x + 2) c. f(x) + 4 d. f(x) − 1 e. 2f(x) f. 1 2 f(x) g. f

> Use the graph of f shown in the figure to sketch the graph of each function. To print an enlarged copy of the graph, go to MathGraphs.com. a. f(x + 3) b. f(x − 1) c. f(x) + 2 d. f(x) − 4 e. 3f(x) f. 1/4 f(x) g

> Use the graph of y = f (x) to match the function with its graph. y = f(x − 1) + 3

> Use the graph of y = f (x) to match the function with its graph. y = f(x + 6) + 2

> Use the graph of y = f (x) to match the function with its graph. y = −f(x − 4)

> Test for symmetry with respect to each axis and to the origin. xy = 4

> Determine whether the statement is true or false. If it is false, explain why or give an example that shows it is false. If the domain of a function consists of a single number, then its range must also consist of only one number.

> Use the graph of y = f (x) to match the function with its graph. y = −f(−x) − 2

> Use the graph of y = f (x) to match the function with its graph. y = f(x) − 5

> Use the graph of y = f (x) to match the function with its graph. y = f(x + 5)

> 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,