Find a. f + t, b. f - t, c. ft, and d. f/t and state their domains. f(x) = 3 − x , g(x) = x2 − 1
> Make a rough sketch of the graph of the function. Do not use a calculator. Just use the graphs given in Figures 3 and 13 and, if necessary, the transformations of Section 1.3. y = 4x - 1 From Figure 3: From figure 15: yt 10 4 2 1.5 114 y. y=e m=1
> Graph the given functions on a common screen. How are these graphs related? y = 0.9x, y = 0.6x, y = 0.3x, y = 0.1x
> Graph the given functions on a common screen. How are these graphs related? y = 3x, y = 10x, y = (1/3)x, y = (1/10)x
> Graph the given functions on a common screen. How are these graphs related? y = ex, y = e2x, y = 8x, y = 82x
> Graph the given functions on a common screen. How are these graphs related? y = 2x, y = ex, y = 5x, y = 20x
> a. How is the number e defined? b. What is an approximate value for e? c. What is the natural exponential function?
> Sketch a rough graph of the market value of a new car as a function of time for a period of 20 years. Assume the car is well maintained.
> a. Write an equation that defines the exponential function with base b>0. b. What is the domain of this function? c. If b ≠ 1, what is the range of this function? d. Sketch the general shape of the graph of the exponential function for each of the fol
> The graph off is given. Draw the graphs of the following functions. a. y = f(x) - 3 b. y = f(x + 1) c. y = 1/2 f(x) d. y = -f (x) 0 1 2.
> The graph of y = f(x) is given. Match each equation with its graph and give reasons for your choices. a. y = f(x - 4) b. y = f(x) + 3 c. y = 1/3 f(x) d. y = -f(x - 4) e. y = 2f(x + 6) 3 -3 3 6 -3 5)
> Explain how each graph is obtained from the graph of y = f(x). a. y = f(x) + 8 b. y = f(x + 8) c. y = 8f(x) d. y = f(8x) e. y = -f(x) - 1 f. y = 8f(1/8 x)
> Suppose the graph off is given. Write equations for the graphs that are obtained from the graph off as follows. a. Shift 3 units upward. b. Shift 3 units downward. c. Shift 3 units to the right. d. Shift 3 units to the left. e. Reflect about the x-a
> Suppose g is an odd function and let h = f 0 g. Is h always an odd function? What if f is odd? What if f is even?
> Suppose g is an even function and let h = f 0 g. Is h always an even function?
> If f(x) = x + 4 and h(x) = 4x - 1, find a function g such that g 0 f = h.
> a. If g(x) = 2x + 1 and h(x) = 4x2 + 4x + 7, find a function f such that f 0 g = h. (Think about what operations you would have to perform on the formula for g to end up with the formula for h.) b. If f(x) = 3x + 5 and h(x) = 3x2 + 3x + 2, find a functi
> If you invest x dollars at 4% interest compounded annually, then the amount A(x) of the investment after one year is A(x) = 1.04x. Find A 0 A, A 0 A 0 A, and A 0 A 0 A 0 A. What do these compositions represent? Find a formula for the composition of n cop
> Sketch a rough graph of the outdoor temperature as a function of time during a typical spring day.
> Let f and t be linear functions with equations f(x) = m1x + b1 and g(x) = m2x + b2. Is f 0 t also a linear function? If so, what is the slope of its graph?
> The Heaviside function defined in Exercise 59 can also be used to define the ramp function y = ctH(t), which represents a gradual increase in voltage or current in a circuit. a. Sketch the graph of the ramp function y = tH(t). b. Sketch the graph of th
> The Heaviside function H is defined by It is used in the study of electric circuits to represent the sudden surge of electric current, or voltage, when a switch is instantaneously turned on. a. Sketch the graph of the Heaviside function. b. Sketch th
> An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t = 0. a. Express the horizontal distance d (in miles) that the plane has flown as a function of t. b. Express the distance s betwe
> A ship is moving at a speed of 30 km/h parallel to a straight shoreline. The ship is 6 km from shore and it passes a lighthouse at noon. a. Express the distance s between the lighthouse and the ship as a function of d, the distance the ship has traveled
> A spherical balloon is being inflated and the radius of the balloon is increasing at a rate of 2 cm/s. a. Express the radius r of the balloon as a function of the time t (in seconds). b. If V is the volume of the balloon as a function of the radius, fi
> A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 60 cm/s. a. Express the radius r of this circle as a function of the time t (in seconds). b. If A is the area of this circle as a function of the radius, find
> Use the given graphs of f and g to estimate the value of f(g(x)) for x = 25, 24, 23,..., 5. Use these estimates to sketch a rough graph of f 0 g. 1 f
> Use the given graphs of f and g to evaluate each expression, or explain why it is undefined. a. f(g(2)) b. g(f(0)) c. (f 0 g)(0) d. (g 0 f)(6) e. (g 0 g)(-2) f. (f 0 f)(4) 19 f 2 2.
> Use the table to evaluate each expression. a. f(g(1)) b. g(f(1)) c. f(f(1)) d. g(g(1)) e. (g 0 f)(3) f. (f 0 g)(6) 1 3 4 5 f(x) 3 1 4 2 2 5 g(x) 3 2 1 2 3
> Sketch a rough graph of the number of hours of daylight as a function of the time of year.
> Express the function in the form f 0 g 0 h. S(t) = sin2(cos t)
> Express the function in the form f 0 g 0 h. H(x) = 8 2 +|x|
> Express the function in the form f 0 g 0 h. R(x) =√ x − 1
> Express the function in the form f 0 g. u(t) =tan t / 1 + tan t
> Express the function in the form f 0 g. v(t) = sec(t2) tan(t2)
> Express the function in the form f 0 g. G(x) = 3 x/ 1+x
> Express the function in the form f 0 g. F(x) = ∛x / 1 + ∛x
> Express the function in the form f 0 g. F(x) = cos2x
> Express the function in the form f 0 g. F(x) = (2x + x2)4
> Find f 0 g 0 h. f(x) = tan x, g(x) = x/x - 1, h(x) = 3√ x
> The graph shows the power consumption for a day in September in San Francisco. (P is measured in megawatts; t is measured in hours starting at midnight.) a. What was the power consumption at 6 am? At 6 pm? b. When was the power consumption the lowest?
> Find f 0 g 0 h. f(x) =
> Find f 0 g 0 h. f(x) =|x - 4|, g(x) = 2x, h(x) = √x
> Find f 0 g 0 h. f(x) = 3x - 2
> Find the functions a. f 0 g, b. g 0 f, c. f 0 f, and d. g 0 g and their domains. F(x) = x / 1 + x , g(x) = sin 2x
> Find the functions a. f 0 g, b. g 0 f, c. f 0 f, and d. g 0 g and their domains. f(x) = x + 1 / x , g(x) = x + 1 / x + 2
> Find the functions a. f 0 g, b. g 0 f, c. f 0 f, and d. g 0 g and their domains. f(x) = sin x, g(x) = x2 + 1
> Find the functions a. f 0 g, b. g 0 f, c. f 0 f, and d. g 0 g and their domains. f(x) = x + 1 , g(x) = 4x - 3
> Find the functions a. f 0 g, b. g 0 f, c. f 0 f, and d. g 0 g and their domains. f(x) = x3 - 2, g(x) = 1 - 4x
> Find the functions a. f 0 g, b. g 0 f, c. f 0 f, and d. g 0 g and their domains. f(x) = 3x + 5, g(x) = x2 + x
> Three runners compete in a 100-meter race. The graph depicts the distance run as a function of time for each runner. Describe in words what the graph tells you about this race. Who won the race? Did each runner finish the race? y4 (meters) AB C 100
> Find a. f + t, b. f - t, c. ft, and d. f/t and state their domains. f(x) = x3 + 2x2, g(x) = 3x2 - 1
> Use the given graph off to sketch the graph of y = 1/f(x). Which features of f are the most important in sketching y = 1/f(x)? Explain how they are used. yA 1
> a. How is the graph of y = f(|x|) related to the graph off ? b. Sketch the graph of y = sin|x|. c. Sketch the graph of y = √|x|.
> In a normal respiratory cycle the volume of air that moves into and out of the lungs is about 500 mL. The reserve and residue volumes of air that remain in the lungs occupy about 2000 mL and a single respiratory cycle for an average human takes about 4 s
> Some of the highest tides in the world occur in the Bay of Fundy on the Atlantic Coast of Canada. At Hopewell Cape the water depth at low tide is about 2.0 m and at high tide it is about 12.0 m. The natural period of oscillation is about 12 hours and on
> A variable star is one whose brightness alternately increases and decreases. For the most visible variable star, Delta Cephei, the time between periods of maximum brightness is 5.4 days, the average brightness (or magnitude) of the star is 4.0, and its b
> The city of New Orleans is located at latitude 30°N. Use Figure 9 to find a function that models the number of hours of daylight at New Orleans as a function of the time of year. To check the accuracy of your model, use the fact that on March
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y =| cosπ x|
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y =|√x - 1|
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = ¼ tan (x – π/4)
> You put some ice cubes in a glass, fill the glass with cold water, and then let the glass sit on a table. Describe how the temperature of the water changes as time passes. Then sketch a rough graph of the temperature of the water as a function of the ela
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = |x - 2|
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y =|x|- 2
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = sin(1/2x)
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = 3 - 2 cos x
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = 2 - √x
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = 1 + sinπ x
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = x2 - 4x + 5
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = 2 x + 1
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = 2 cos 3x
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = 1 – 1/x
> Trees grow faster and form wider rings in warm years and grow more slowly and form narrower rings in cooler years. The figure shows ring widths of a Siberian pine from 1500 to 2000. a. What is the range of the ring width function? b. What does the grap
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = x3 + 1
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = (x - 3)2
> Graph the function by hand, not by plotting points, but by starting with the graph of one of the standard functions given in Section 1.2, and then applying the appropriate transformations. y = -x2
> a. How is the graph of y = 2sinx related to the graph of y = sinx? Use your answer and Figure 6 to sketch the graph of y = 2sinx. b. How is the graph of y = 1 + √x related to the graph of y = √x ? Use your answer and
> The graph of y = 3x − x2 is given. Use transformations to create a function whose graph is as shown. yA 1.5- y=V3x– x² 3 yA -4 -1 0 --2.5
> The graph of y = 3x − x2 is given. Use transformations to create a function whose graph is as shown. yA 1.5- y=V3x– x² 3 y. 3- 5 х 2.
> The graph off is given. Use it to graph the following functions. a. y = f(2x) b. y = f(1/2x) c. y = f(-x) d. y = 2f(-x) yA 1 이 1
> Match each equation with its graph. Explain your choices. (Don’t use a computer or graphing calculator.) a.y=3x b. y = 3x c. y = x3 d. y = 3
> Match each equation with its graph. Explain your choices. (Don’t use a computer or graphing calculator.) a. y = x2 b. y = x5 c. y = x8 4.
> Classify each function as a power function, root function, polynomial (state its degree), rational function, algebraic function, trigonometric function, exponential function, or logarithmic function. a. y = πx b. y = x π c. y = x2(2 - x3) d. y = tan t
> Shown is a graph of the global average temperature T during the 20th century. Estimate the following. a. The global average temperature in 1950 b. The year when the average temperature was 14.2°C c. The year when the temperature was smalles
> Classify each function as a power function, root function, polynomial (state its degree), rational function, algebraic function, trigonometric function, exponential function, or logarithmic function. a. f(x) = log2 x b. g(x) = 4
> The table shows the mean (average) distances d of the planets from the sun (taking the unit of measurement to be the distance from the earth to the sun) and their periods T (time of revolution in years). a. Fit a power model to the data. b. Kepler&acir
> The table shows the number N of species of reptiles and amphibians inhabiting Caribbean islands and the area A of the island in square miles. a. Use a power function to model N as a function of A. b. The Caribbean island of Dominica has area 291 mi2. H
> It makes sense that the larger the area of a region, the larger the number of species that inhabit the region. Many ecologists have modeled the species-area relation with a power function and, in particular, the number of species S of bats living in cave
> Many physical quantities are connected by inverse square laws, that is, by power functions of the form f(x) = kx-2. In particular, the illumination of an object by a light source is inversely proportional to the square of the distance from the source. Su
> The table shows average US retail residential prices of electricity from 2000 to 2012, measured in cents per kilowatt hour. a. Make a scatter plot. Is a linear model appropriate? b. Find and graph the regression line. c. Use your linear model from par
> The table shows world average daily oil consumption from 1985 to 2010 measured in thousands of barrels per day. a. Make a scatter plot and decide whether a linear model is appropriate. b. Find and graph the regression line. c. Use the linear model to
> When laboratory rats are exposed to asbestos fibers, some of them develop lung tumors. The table lists the results of several experiments by different scientists. a. Find the regression line for the data. b. Make a scatter plot and graph the regression
> Anthropologists use a linear model that relates human femur (thighbone) length to height. The model allows an anthropologist to determine the height of an individual when only a partial skeleton (including the femur) is found. Here we find the model by a
> Biologists have observed that the chirping rate of crickets of a certain species appears to be related to temperature. The table shows the chirping rates for various temperatures. a. Make a scatter plot of the data. b. Find and graph the regression lin
> Determine whether the curve is the graph of a function of x. If it is, state the domain and range of the function. 이 1
> If f(x) = x + 2−
> What three data anomalies are likely to be the result of data redundancy? How can such anomalies be eliminated?
> What is normalization?
> Is it possible for a book to appear in the BOOK table without appearing in the PRODUCT table? Why or why not?
> According to the data model, is it required that every entity instance in the PRODUCT table be associated with an entity instance in the CD table? Why or why not?
> List all of the attributes of a movie.
