Calculus: Early Transcendentals
8th Edition
ISBN: 9781305267268
Author: James Stewart
Publisher: Brooks Cole
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Textbook Question
Chapter 1.1, Problem 67E
In a certain country, income tax is assessed as follows. There is no tax on income up to$10,000. Any income over $10,000 is taxed at a rate of 10%, up to an income of $20,000. Any income over $20,000 is taxed at 15%.
(a) Sketch the graph of the tax rate R as a function of the income I.
(b) How much tax is assessed on an income of $14,000? On $26,000?
(c) Sketch the graph of the total assessed tax T as a function of the income I.
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In a certain country, income tax is assessed as follows. There is no tax on income up to $10,000. Any incomeover $10,000 is taxed at a rate of 10%, up to an income of $20,000. Any income over $20,000 is taxed at 15%.a) Sketch the graph of the tax rate R as a function of the income I.b) How much tax is assessed on an income of $14,000? On $26,000?c) Sketch the graph of the total assessed tax T as a function of the income I
In a certain country, income tax is assessed as follows.There is no tax on income up to $10,000. Any income over$10,000 is taxed at a rate of 10%, up to an income of$20,000. Any income over $20,000 is taxed at 15%.(a) Sketch the graph of the tax rate as a function of theincome .(b) How much tax is assessed on an income of $14,000?On $26,000?(c) Sketch the graph of the total assessed tax as a functionof the income .
A manufacturer of a particular item has monthly fixed costs of
$700
and variable costs of
$25
per item, and it sells the items for
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a. Write a function that models the monthly profit P from the production and sale of x units of the item.
b. What is the profit if
170
items are produced and sold in 1 month?
c. At what rate does the profit grow as the number of items increases?
Chapter 1 Solutions
Calculus: Early Transcendentals
Ch. 1.1 - If f(x)=x+2x and g(u)=u+2u, is it true that f = g?Ch. 1.1 - If f(x)=x2xx1andg(x)=x is it true that f = g?Ch. 1.1 - The graph of a function f is given. (a) State the...Ch. 1.1 - The graphs of f and g are given. (a) State the...Ch. 1.1 - Figure 1 was recorded by an instrument operated by...Ch. 1.1 - Determine whether the curve is the graph of a...Ch. 1.1 - Determine whether the curve is the graph of a...Ch. 1.1 - Determine whether the curve is the graph of a...Ch. 1.1 - Determine whether the curve is the graph of a...Ch. 1.1 - Shown is a graph of the global average temperature...
Ch. 1.1 - Trees grow faster and form wider rings in warm...Ch. 1.1 - You put some ice cubes in a glass, fill the glass...Ch. 1.1 - Three runners compete in a 100-meter race. The...Ch. 1.1 - The graph shows the power consumption for a day in...Ch. 1.1 - Sketch a rough graph of the number of hours of...Ch. 1.1 - Sketch a rough graph of the outdoor temperature as...Ch. 1.1 - Sketch a rough graph of the market value of a new...Ch. 1.1 - Sketch the graph of the amount of a particular...Ch. 1.1 - You place a frozen pie in an oven and bake it for...Ch. 1.1 - A homeowner mows the lawn every Wednesday...Ch. 1.1 - An airplane takes off from an airport and lands an...Ch. 1.1 - Temperature readings T (in F) were recorded every...Ch. 1.1 - Researchers measured the blood alcohol...Ch. 1.1 - If f(x) = 3x2 x + 2, find f(2), f(2), f(a), f(a),...Ch. 1.1 - A spherical balloon with radius r inches has...Ch. 1.1 - Evaluate the difference quotient for the given...Ch. 1.1 - Evaluate the difference quotient for the given...Ch. 1.1 - Evaluate the difference quotient for the given...Ch. 1.1 - Evaluate the difference quotient for the given...Ch. 1.1 - Find the domain of the function. 31. f(x)=x+4x29Ch. 1.1 - Find the domain of the function. 32....Ch. 1.1 - Find the domain of the function. 33. f(t)=2t13Ch. 1.1 - Find the domain of the function. 34. g(t)=3t2+tCh. 1.1 - Find the domain of the function. 35. h(x)=1x25x4Ch. 1.1 - Find the domain of the function. 36....Ch. 1.1 - Find the domain of the function. 37. F(p)=2pCh. 1.1 - Find the domain and range and sketch the graph of...Ch. 1.1 - Find the domain and sketch the graph of the...Ch. 1.1 - Find the domain and sketch the graph of the...Ch. 1.1 - Evaluate f(3), f(0), and f(2) for the piecewise...Ch. 1.1 - Evaluate f(3), f(0), and f(2) for the piecewise...Ch. 1.1 - Evaluate f(3), f(0), and f(2) for the piecewise...Ch. 1.1 - Evaluate f(3), f(0), and f(2) for the piecewise...Ch. 1.1 - Sketch the graph of the function. 45. f(x) = x +...Ch. 1.1 - Sketch the graph of the function. 46. f(x) = |x +...Ch. 1.1 - Sketch the graph of the function. 47. g(t) = |1 ...Ch. 1.1 - Sketch the graph of the function. 48. h(t) = |t| +...Ch. 1.1 - Sketch the graph of the function. 49....Ch. 1.1 - Sketch the graph of the function. 50. g(x) = ||x| ...Ch. 1.1 - Find an expression for the function whose graph is...Ch. 1.1 - Find an expression for the function whose graph is...Ch. 1.1 - Find an expression for the function whose graph is...Ch. 1.1 - Find an expression for the function whose graph is...Ch. 1.1 - Find an expression for the function whose graph is...Ch. 1.1 - Find an expression for the function whose graph is...Ch. 1.1 - Find a formula for the described function and...Ch. 1.1 - Find a formula for the described function and...Ch. 1.1 - Find a formula for the described function and...Ch. 1.1 - Find a formula for the described function and...Ch. 1.1 - Find a formula for the described function and...Ch. 1.1 - A Norman window has the shape of a rectangle...Ch. 1.1 - A box with an open top is to be constructed from a...Ch. 1.1 - A cell phone plan has a basic charge of 35 a...Ch. 1.1 - In a certain state the maximum speed permitted on...Ch. 1.1 - An electricity company charges its customers a...Ch. 1.1 - In a certain country, income tax is assessed as...Ch. 1.1 - The functions in Example 10 and Exercise 67 are...Ch. 1.1 - Graphs of f and g are shown. Decide whether each...Ch. 1.1 - Graphs of f and g are shown. Decide whether each...Ch. 1.1 - (a) If the point (5, 3) is on the graph of an even...Ch. 1.1 - A function f has domain [5, 5] and a portion of...Ch. 1.1 - Determine whether f is even, odd, or neither. If...Ch. 1.1 - Determine whether f is even, odd, or neither. If...Ch. 1.1 - Determine whether f is even, odd, or neither. If...Ch. 1.1 - Determine whether f is even, odd, or neither. If...Ch. 1.1 - Determine whether f is even, odd, or neither. If...Ch. 1.1 - Determine whether f is even, odd, or neither. If...Ch. 1.1 - If f and g are both even functions, is f + g even?...Ch. 1.1 - If f and g are both even functions, is the product...Ch. 1.2 - Classify each function as a power function, root...Ch. 1.2 - Classify each function as a power function, root...Ch. 1.2 - Match each equation with its graph. Explain your...Ch. 1.2 - Match each equation with its graph. Explain your...Ch. 1.2 - Find the domain of the function. 5. f(x)=cosx1sinxCh. 1.2 - Find the domain of the function. 6. g(x)=11tanxCh. 1.2 - (a) Find an equation for the family of linear...Ch. 1.2 - What do all members of the family of linear...Ch. 1.2 - What do all members of the family of linear...Ch. 1.2 - Find expressions for the quadratic functions whose...Ch. 1.2 - Find an expression for a cubic function f if...Ch. 1.2 - Recent studies indicate that the average surface...Ch. 1.2 - If the recommended adult dosage for a drug is D...Ch. 1.2 - The manager of a weekend flea market knows from...Ch. 1.2 - The relationship between the Fahrenheit (F) and...Ch. 1.2 - Jason leaves Detroit at 2:00 PM and drives at a...Ch. 1.2 - Biologists have noticed that the chirping rate of...Ch. 1.2 - The manager of a furniture factory finds that it...Ch. 1.2 - At the surface of the ocean, the water pressure is...Ch. 1.2 - The monthly cost of driving a car depends on the...Ch. 1.2 - For each scatter plot, decide what type of...Ch. 1.2 - For each scatter plot, decide what type of...Ch. 1.3 - Suppose the graph of f is given. Write equations...Ch. 1.3 - Explain how each graph is obtained from the graph...Ch. 1.3 - The graph of y=f(x) is given. Match each equation...Ch. 1.3 - The graph of f is given. Draw the graphs of the...Ch. 1.3 - The graph of f is given. Use it to graph the...Ch. 1.3 - The graph of y=3xx2 is given. Use transformations...Ch. 1.3 - The graph of y=3xx2 is given. Use transformations...Ch. 1.3 - (a) How is the graph of y = 2 sin x related to the...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Prob. 10ECh. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Prob. 18ECh. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Graph the function by hand, not by plotting...Ch. 1.3 - Prob. 21ECh. 1.3 - Prob. 22ECh. 1.3 - Prob. 23ECh. 1.3 - Prob. 24ECh. 1.3 - The city of New Orleans is located at latitude...Ch. 1.3 - A variable star is one whose brightness...Ch. 1.3 - Some of the highest tides in the world occur in...Ch. 1.3 - In a normal respiratory cycle the volume of air...Ch. 1.3 - (a) How is the graph of y=f(|x|)related to the...Ch. 1.3 - Use the given graph of f to sketch the graph of y...Ch. 1.3 - Prob. 31ECh. 1.3 - Find (a) f + g, (b) f g, (c) fg, and (d) f/g and...Ch. 1.3 - Find the functions (a) fg, (b) gf, (c) ff, and (d)...Ch. 1.3 - Find the functions (a) fg, (b) gf, (c) ff, and (d)...Ch. 1.3 - Find the functions (a) fg, (b) gf, (c) ff, and (d)...Ch. 1.3 - Prob. 36ECh. 1.3 - Find the functions (a) f g, (b) g f, (c) f f,...Ch. 1.3 - Find the functions (a) f g, (b) g f, (c) f f,...Ch. 1.3 - Find f g h. 39. f(x) = 3x 2, g (x) = sin x,...Ch. 1.3 - Prob. 40ECh. 1.3 - Find f g h. 41.f(x)=x3, g(x) = x2, h(x) = x3 + 2Ch. 1.3 - Find f g h. 42. f(x) = tan x, g(x)=xx1,h(x)=x3Ch. 1.3 - Express the function in the form f g. 43. F(x) =...Ch. 1.3 - Express the function in the form f g. 44. F(x) =...Ch. 1.3 - Prob. 45ECh. 1.3 - Prob. 46ECh. 1.3 - Express the function in the form f g. 47. v(t) =...Ch. 1.3 - Prob. 48ECh. 1.3 - Prob. 49ECh. 1.3 - Prob. 50ECh. 1.3 - Prob. 51ECh. 1.3 - Use the table to evaluate each expression. (a)...Ch. 1.3 - Use the given graphs of f and g to evaluate each...Ch. 1.3 - Use the given graphs of f and g to estimate the...Ch. 1.3 - A stone is dropped into a lake, creating a...Ch. 1.3 - A spherical balloon is being inflated and the...Ch. 1.3 - Prob. 57ECh. 1.3 - An airplane is flying at a speed of 350 mi/h at an...Ch. 1.3 - The Heaviside function H is defined by It is used...Ch. 1.3 - The Heaviside function defined in Exercise 59 can...Ch. 1.3 - Let f and g be linear functions with equations...Ch. 1.3 - Prob. 62ECh. 1.3 - (a) If g(x) = 2x + 1 and h(x) = 4x2 + 4x + 7, find...Ch. 1.3 - If f(x) = x + 4 and h(x) = 4x 1, find a function...Ch. 1.3 - Suppose g is an even function and let h =f g. Is...Ch. 1.3 - Suppose g is an odd function and let h = f g. Is...Ch. 1.4 - Use the Law of Exponents to rewrite and simplify...Ch. 1.4 - Use the Law of Exponents to rewrite and simplify...Ch. 1.4 - Use the Law of Exponents to rewrite and simplify...Ch. 1.4 - Use the Law of Exponents to rewrite and simplify...Ch. 1.4 - (a) Write an equation that defines the exponential...Ch. 1.4 - (a) How is the number e defined? (b) What is an...Ch. 1.4 - Graph the given functions on a common screen. How...Ch. 1.4 - Graph the given functions on a common screen. How...Ch. 1.4 - Graph the given functions on a common screen. How...Ch. 1.4 - Graph the given functions on a common screen. 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(a)...Ch. 1.4 - Find the exponential function f(x) = Cb2 whose...Ch. 1.4 - Find the exponential function f(x) = Cbx whose...Ch. 1.4 - If f(x) = 5x, show that f(x+h)f(x)h=5x(5h1h)Ch. 1.4 - Suppose you are offered a job that lasts one...Ch. 1.4 - Prob. 25ECh. 1.4 - Compare the functions f(x) = x5and g(x) = 5x by...Ch. 1.4 - Compare the functions f(x) = x10 and g(x) = ex by...Ch. 1.4 - Use a graph to estimate the values of x such that...Ch. 1.4 - A bacteria culture starts with 500 bacteria and...Ch. 1.4 - The half-life of bismuth-210, 210Bi, is 5 days....Ch. 1.4 - An isotope of sodium, 24Na, has a half-life of 15...Ch. 1.4 - Prob. 33ECh. 1.4 - After alcohol is fully absorbed into the body, it...Ch. 1.4 - Use a graphing calculator with exponential...Ch. 1.4 - The table gives the population of the United...Ch. 1.4 - If you graph the function f(x)=1e1/x1+e1/x you' ll...Ch. 1.4 - Graph several members of the family of functions...Ch. 1.5 - (a) What is a one-to-one function? (b) How can you...Ch. 1.5 - (a) Suppose f is a one-to-one function with domain...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - A function is given by a table of values, a graph,...Ch. 1.5 - Assume that f is a one-to-one function. (a) If...Ch. 1.5 - If f(x) = x5 + x3 + x, find f1(3) and f(f 1(2)).Ch. 1.5 - If g(x) = 3 + x + ex, find g1(4).Ch. 1.5 - The graph of f is given. (a) Why is f one-to-one?...Ch. 1.5 - The formula C=59(F32), where F 459.67, expresses...Ch. 1.5 - In the theory of relativity, the mass of a...Ch. 1.5 - Find a formula for the inverse of the function....Ch. 1.5 - Find a formula for the inverse of the function....Ch. 1.5 - Find a formula for the inverse of the function....Ch. 1.5 - Find a formula for the inverse of the function....Ch. 1.5 - Find a formula for the inverse of the function....Ch. 1.5 - Find a formula for the inverse of the function....Ch. 1.5 - Find an explicit formula for f1 and use it to...Ch. 1.5 - Find an explicit formula for f1 and use it to...Ch. 1.5 - Prob. 29ECh. 1.5 - Use the given graph of f to sketch the graph of...Ch. 1.5 - Let f(x)=1x2,0x1. (a) Find f1. How is it related...Ch. 1.5 - Prob. 32ECh. 1.5 - Prob. 33ECh. 1.5 - (a) What is the natural logarithm? (b) What is the...Ch. 1.5 - Find the exact value of each expression. 35. (a)...Ch. 1.5 - Find the exact value of each expression. 35. (a)...Ch. 1.5 - Find the exact value of each expression. 37. (a)...Ch. 1.5 - Find the exact value of each expression. 38. (a)...Ch. 1.5 - Express the given quantity as a single logarithm....Ch. 1.5 - Express the given quantity as a single logarithm....Ch. 1.5 - Express the given quantity as a single logarithm....Ch. 1.5 - Use Formula 10 to evaluate each logarithm correct...Ch. 1.5 - Use Formula 10 to graph the given functions on a...Ch. 1.5 - Use Formula 10 to graph the given functions on a...Ch. 1.5 - Suppose that the graph of y = log2 x is drawn on a...Ch. 1.5 - Prob. 46ECh. 1.5 - Prob. 47ECh. 1.5 - Prob. 48ECh. 1.5 - (a) What are the domain and range of f? (b) What...Ch. 1.5 - (a) What are the domain and range of f? (b) What...Ch. 1.5 - Solve each equation for x. 51. (a) e74x=6 (b)...Ch. 1.5 - Solve each equation for x. 52. (a) ln(x2 1) = 3...Ch. 1.5 - Solve each equation for x. 53. (a) 2x5 = 3 (b) ln...Ch. 1.5 - Solve each equation for x. 54. (a) ln(ln x) = 1...Ch. 1.5 - Solve each inequality for x. 55. (a) ln x 0 (b)...Ch. 1.5 - Solve each inequality for x. 56. (a) 1 e3x1 2...Ch. 1.5 - (a) Find the domain of f(x) = ln(ex 3). (b) Find...Ch. 1.5 - (a) What are the values of eln 300 and ln(e300)?...Ch. 1.5 - If a bacteria population starts with 100 bacteria...Ch. 1.5 - When a camera flash goes off, the batteries...Ch. 1.5 - Find the exact value of each expression. 63. (a)...Ch. 1.5 - Find the exact value of each expression. 64. (a)...Ch. 1.5 - Prob. 65ECh. 1.5 - Find the exact value of each expression. 66. (a)...Ch. 1.5 - Find the exact value of each expression. 67. (a)...Ch. 1.5 - Find the exact value of each expression. 68. (a)...Ch. 1.5 - Prove that cos(sin1x)=1x2.Ch. 1.5 - Simplify the expression. 70. tan(sin1 x)Ch. 1.5 - Simplify the expression. 71. sin(tan1 x)Ch. 1.5 - Simplify the expression. 72. sin(2 arccos x)Ch. 1.5 - Prob. 73ECh. 1.5 - Prob. 74ECh. 1.5 - Find the domain and range of the function g(x) =...Ch. 1.5 - (a) Graph the function f(x) = sin(sin1 x) and...Ch. 1.5 - (a) If we shift a curve to the left, what happens...Ch. 1 - (a) What is a function? What are its domain and...Ch. 1 - Discuss four ways of representing a function....Ch. 1 - (a) What is an even function? How can you tell if...Ch. 1 - What is an increasing function?Ch. 1 - What is a mathematical model?Ch. 1 - Give an example of each type of function. (a)...Ch. 1 - Sketch by hand, on the same axes, the graphs of...Ch. 1 - Draw, by hand, a rough sketch of the graph of each...Ch. 1 - Suppose that f has domain A and g has domain B....Ch. 1 - How is the composite function f g defined? What...Ch. 1 - Suppose the graph of f is given. Write an equation...Ch. 1 - (a) What is a one-to-one function? How can you...Ch. 1 - (a) How is the inverse sine function f(x) = sin1 x...Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Determine whether the statement is true or false....Ch. 1 - Let f be the function whose graph is given. (a)...Ch. 1 - The graph of g is given. (a) State the value of...Ch. 1 - lf f(x) = x2 2x + 3, evaluate the difference...Ch. 1 - Sketch a rough graph or the yield of a crop as a...Ch. 1 - Find the domain and range of the function. Write...Ch. 1 - Find the domain and range of the function. Write...Ch. 1 - Prob. 7RECh. 1 - Find the domain and range of the function. Write...Ch. 1 - Prob. 9RECh. 1 - The graph of .f is given. Draw the graphs of the...Ch. 1 - Prob. 11RECh. 1 - Use transformations to sketch the graph of the...Ch. 1 - Prob. 13RECh. 1 - Use transformations to sketch the graph of the...Ch. 1 - Use transformations to sketch the graph of the...Ch. 1 - Use transformations to sketch the graph of the...Ch. 1 - Determine whether f is even, odd, or neither even...Ch. 1 - Find an expression for the function whose graph...Ch. 1 - If f(x) = In x and g(x) = x2 9. find the...Ch. 1 - Express the function F(x)=1/x+x as a composition...Ch. 1 - A small-appliance manufacturer finds that it costs...Ch. 1 - If f(x) = 2x + In x, find f1(2).Ch. 1 - Find the inverse function of f(x)=x+12x+1.Ch. 1 - Find the exact value of each expression. 64. (a)...Ch. 1 - Prob. 26RECh. 1 - The half-life of palladium-100, 100Pd, is four...Ch. 1 - The population of a certain species in a limited...Ch. 1 - One of the legs of a right triangle has length 4...Ch. 1 - The altitude perpendicular to the hypotenuse of a...Ch. 1 - Solve the equation |2x 1| |x + 5| = 3.Ch. 1 - Solve the inequality |x 1| |x 3| 5.Ch. 1 - Prob. 5PCh. 1 - Sketch the graph of the function g(x) = |x2 1 | ...Ch. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - The notation max{a, b, } means the largest of the...Ch. 1 - Sketch the region in the plane defined by each of...Ch. 1 - Evaluate (log2 3)(log3 4)(log4 5)(log31 32).Ch. 1 - (a) Show that the function f(x)=ln(x+x2+1) is an...Ch. 1 - Solve the inequality ln(x2 2x 2) 0.Ch. 1 - Use indirect reasoning to prove that log2 5 is an...Ch. 1 - A driver sets out on a journey. For the first half...Ch. 1 - Is it true that f(g+h)=fg+fh?Ch. 1 - Prove that if n is a positive integer, then 7n 1...Ch. 1 - Prove that 1 + 3 + 5 + + (2n l ) = n2.Ch. 1 - If fo(x) = x2 and fn+1(x) = fo(fn(x)) for n = 0,...Ch. 1 - (a) If fo(x)=12x and fn+1=fofnforn=0,1,2,, find an...
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- The John Deere company has found that the revenue from sales of heavy-duty tractors is a function of the unit price p, in dollars, that it charges. If the revenue R, in dollars, is R(p) = - 1/2 p2 + 1900p (a) At what prices p is revenue zero?(b) For what range of prices will revenue exceed $1,200,000?arrow_forwardX+200p=10,000 X>0 P>0 express the revenue (price times units sold), R, as a function of p. R=arrow_forwardConsider a manufacturer of widgets with fixed costs of $1700 per month and a variable cost of $18 per widget. Suppose the manufacturer sells 100 widgets for $2700 total. (a) Use a formula to express the total monthly revenue R, in dollars, of this manufacturer in a month as a function of the number N of widgets produced in a month.R = 27N (b) Use a formula to express the monthly profit P, in dollars, of this manufacturer as a function of the number of widgets produced in a month.P =arrow_forward
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- The monthly cost for household water is computed based on the amount of water used in thousand gallons: kgals. A local water company charges a monthly service fee of $20 and then charges $1.25 for each kgal of water used up to 10 kgals. To discourage excessive use, each kgal of water beyond 10 kgals is charged at rate of $2.75 per kgal. a) Write a piecewise defined function for the monthly cost of household water, C, in terms of the amount of water used, x kgal. b) Using your model, determine the monthly water bill if 9 kgals of water is used by a household. c) Using your model, determine the monthly water bill if 14 kgals of water is used by a household. d) If a monthly water bill was $75, how much water did this household use (according to your model)? Be precise! Your answer should be accurate to 3 decimal places.arrow_forwardThe Ministry of Finance in Paradise Island determined that the import demand for Cognac is related to a proposed luxury tax using the formula: C(x) = √10000 − 40x − 0.02x2 where C(x) measures the percentage of normal consumption of Cognac when a luxury tax of x% is imposed on it. (i) Write a function for the rate of change import demand with respect to changes in the luxury tax. (ii) Find the rate of change of C(x) for a 10% tax. (iii) Find the rate of change of C(x) for a 100% tax.arrow_forwardOn a certain route, an airline carries 6000 passengers per month, each paying $200. A market survey indicates that for each $1 increase in the ticket price, the airline will lose 100 passengers. a. Express the number of passengers per month, N, as a function of the ticket price, x. b. The airline’s monthly revenue for the route is the product of the number of passengers and the ticket price. Express the monthly revenue, R, as a function of the ticket price, x.arrow_forward
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