
Mathematical Applications for the Management, Life, and Social Sciences
11th Edition
ISBN: 9781305108042
Author: Ronald J. Harshbarger, James J. Reynolds
Publisher: Cengage Learning
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Chapter 11.2, Problem 55E
To determine
To calculate: The rate of change of intensity
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- Suppose that you have the differential equation:
dy
= (y - 2) (y+3)
dx
a. What are the equilibrium solutions for the differential equation?
b. Where is the differential equation increasing or decreasing? Show how you know.
Showing them on the drawing is not enough.
c. Where are the changes in concavity for the differential equation? Show how you
know. Showing them on the drawing is not enough.
d. Consider the slope field for the differential equation. Draw solution curves given the
following initial conditions:
i. y(0) = -5
ii. y(0) = -1
iii. y(0) = 2
5. Suppose that a mass of 5 stretches a spring 10. The mass is acted on by an external force
of F(t)=10 sin () and moves in a medium that gives a damping coefficient of ½. If the mass
is set in motion with an initial velocity of 3 and is stretched initially to a length of 5. (I
purposefully removed the units- don't worry about them. Assume no conversions are
needed.)
a) Find the equation for the displacement of the spring mass at time t.
b) Write the equation for the displacement of the spring mass in phase-mode form.
c) Characterize the damping of the spring mass system as overdamped, underdamped or
critically damped. Explain how you know.
D.E. for Spring Mass Systems
k
m* g = kLo
y" +—y' + — —±y = —±F(t), y(0) = yo, y'(0) = vo
m
2
A₁ = √c₁² + C₂²
Q = tan-1
4. Given the following information determine the appropriate trial solution to find yp. Do not
solve the differential equation. Do not find the constants.
a) (D-4)2(D+ 2)y = 4e-2x
b) (D+ 1)(D² + 10D +34)y = 2e-5x cos 3x
Chapter 11 Solutions
Mathematical Applications for the Management, Life, and Social Sciences
Ch. 11.1 - 1.
Ch. 11.1 - 2. If
Ch. 11.1 - Prob. 3CPCh. 11.1 - 4. Find .
Ch. 11.1 - Prob. 1ECh. 11.1 - Prob. 2ECh. 11.1 - Prob. 3ECh. 11.1 - Prob. 4ECh. 11.1 - Prob. 5ECh. 11.1 - Find the derivatives of the functions in Problems...
Ch. 11.1 - Find the derivatives of the functions in Problems...Ch. 11.1 - Find the derivatives of the functions in Problems...Ch. 11.1 - Find the derivatives of the functions in Problems...Ch. 11.1 - Find the derivatives of the functions in Problems...Ch. 11.1 - 11. Find .
Ch. 11.1 - Prob. 12ECh. 11.1 - In each of Problems 13-18, find the derivative of...Ch. 11.1 - In each of Problems 13-18, find the derivative of...Ch. 11.1 - In each of Problems 13-18, find the derivative of...Ch. 11.1 - In each of Problems 13-18, find the derivative of...Ch. 11.1 - In each of Problems 13-18, find the derivative of...Ch. 11.1 - In each of Problems 13-18, find the derivative of...Ch. 11.1 - 19. Find .
Ch. 11.1 - Prob. 20ECh. 11.1 - Prob. 21ECh. 11.1 - Prob. 22ECh. 11.1 - Prob. 23ECh. 11.1 - 24. Find
Ch. 11.1 - In Problems 25-38, find y'.
Ch. 11.1 - In Problems 25-38, find y'.
26.
Ch. 11.1 - In Problems 25-38, find y'.
27.
Ch. 11.1 - Prob. 28ECh. 11.1 - In Problems 25-38, find y'.
29.
Ch. 11.1 - Prob. 30ECh. 11.1 - In Problems 25-38, find y'.
31.
Ch. 11.1 - Prob. 32ECh. 11.1 - In Problems 25-38, find y'.
33.
Ch. 11.1 - Prob. 34ECh. 11.1 - Prob. 35ECh. 11.1 - Prob. 36ECh. 11.1 - Prob. 37ECh. 11.1 - Prob. 38ECh. 11.1 - Prob. 39ECh. 11.1 - Prob. 40ECh. 11.1 - Prob. 41ECh. 11.1 - Prob. 42ECh. 11.1 - 43. Marginal cost Suppose that the total cost (in...Ch. 11.1 - 44. Investment If money is invested at the...Ch. 11.1 - 45. Marginal revenue The total revenue, in...Ch. 11.1 - 46. Supply Suppose that the supply of x units of a...Ch. 11.1 - 47. Demand The demand function for a product is...Ch. 11.1 - Prob. 48ECh. 11.1 - Prob. 49ECh. 11.1 - Prob. 50ECh. 11.1 - Prob. 51ECh. 11.1 - 52. Women in the workforce From 1950 and projected...Ch. 11.2 - 1. If , find y’.
Ch. 11.2 - 2. If , find y’.
Ch. 11.2 - Prob. 3CPCh. 11.2 - 4. If the sales of a product are given by , where...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Prob. 3ECh. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Prob. 9ECh. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Prob. 13ECh. 11.2 - Prob. 14ECh. 11.2 - Prob. 15ECh. 11.2 - Prob. 16ECh. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Prob. 18ECh. 11.2 - Prob. 19ECh. 11.2 - Prob. 20ECh. 11.2 - Prob. 21ECh. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Prob. 27ECh. 11.2 - Prob. 28ECh. 11.2 - Find the derivatives of the functions in Problems...Ch. 11.2 - Prob. 30ECh. 11.2 - Prob. 31ECh. 11.2 - Prob. 32ECh. 11.2 - Prob. 33ECh. 11.2 - Prob. 34ECh. 11.2 - Prob. 35ECh. 11.2 - Prob. 36ECh. 11.2 - Prob. 37ECh. 11.2 - Prob. 38ECh. 11.2 - In Problems 39-42, find any relative maxima and...Ch. 11.2 - Prob. 40ECh. 11.2 - Prob. 41ECh. 11.2 - Prob. 42ECh. 11.2 - 43. Future value If $P is invested for n years at...Ch. 11.2 - 44. Future value The future value that accrues...Ch. 11.2 - 45. Sales decay After the end of an advertising...Ch. 11.2 - Prob. 46ECh. 11.2 - 47. Marginal cost Suppose that the total cost in...Ch. 11.2 - 48. Marginal revenue Suppose that the revenue in...Ch. 11.2 - 49. Drugs in a bloodstream The percent...Ch. 11.2 - 50. Radioactive decay The amount of the...Ch. 11.2 - 51. Pollution Pollution levels in Lake Sagamore...Ch. 11.2 - Prob. 52ECh. 11.2 - Prob. 55ECh. 11.2 - Prob. 56ECh. 11.2 - 58. Blood pressure Medical research has shown...Ch. 11.2 - Prob. 59ECh. 11.2 - Prob. 60ECh. 11.2 - Prob. 61ECh. 11.2 - 62. Carbon dioxide emissions Using U.S. Department...Ch. 11.2 - Prob. 66ECh. 11.3 - Find the following:
(b) (c)
Ch. 11.3 - Prob. 2CPCh. 11.3 - In Problems 1-6, find dy/dx at the given point...Ch. 11.3 - In Problems 1-6, find at the given point without...Ch. 11.3 - In Problems 1-6, find dy/dx at the given point...Ch. 11.3 - In Problems 1-6, find at the given point without...Ch. 11.3 - In Problems 1-6, find at the given point without...Ch. 11.3 - In Problems 1-6, find at the given point without...Ch. 11.3 - Find dy/dx for the functions in Problems 7-10.
7....Ch. 11.3 - Find for the functions in Problems 7-10.
8.
Ch. 11.3 - Find for the functions in Problems 7-10.
9.
Ch. 11.3 - Find for the functions in Problems 7-10.
10.
Ch. 11.3 - 11.
Ch. 11.3 - 12.
Ch. 11.3 - 13.
Ch. 11.3 - Prob. 14ECh. 11.3 - Prob. 15ECh. 11.3 - 16.
Ch. 11.3 - 17.
Ch. 11.3 - 18. If find .
Ch. 11.3 - 19.
Ch. 11.3 - Prob. 20ECh. 11.3 - Prob. 21ECh. 11.3 - Prob. 22ECh. 11.3 - Prob. 23ECh. 11.3 - Prob. 24ECh. 11.3 - Prob. 25ECh. 11.3 - Prob. 26ECh. 11.3 - Prob. 27ECh. 11.3 - Prob. 28ECh. 11.3 - Prob. 29ECh. 11.3 - Prob. 30ECh. 11.3 - Prob. 31ECh. 11.3 - Prob. 32ECh. 11.3 - Prob. 33ECh. 11.3 - 34. If ln find .
Ch. 11.3 - Prob. 35ECh. 11.3 - Prob. 36ECh. 11.3 - 35.
Ch. 11.3 - Prob. 38ECh. 11.3 - 37.
Ch. 11.3 - Prob. 40ECh. 11.3 - Prob. 41ECh. 11.3 - Prob. 42ECh. 11.3 - Prob. 43ECh. 11.3 - Prob. 44ECh. 11.3 - Prob. 45ECh. 11.3 - Prob. 46ECh. 11.3 - Prob. 47ECh. 11.3 - Prob. 48ECh. 11.3 - Prob. 49ECh. 11.3 - Prob. 50ECh. 11.3 - Prob. 51ECh. 11.3 - Prob. 52ECh. 11.3 - Prob. 53ECh. 11.3 - Prob. 54ECh. 11.3 - 55. Advertising and sales Suppose that a company’s...Ch. 11.3 - Prob. 56ECh. 11.3 - 57. Production Suppose that a company can produce...Ch. 11.3 - Prob. 58ECh. 11.3 - 59. Demand If the demand function for q units of a...Ch. 11.3 - Prob. 60ECh. 11.3 - Prob. 61ECh. 11.3 - Prob. 62ECh. 11.3 - Prob. 63ECh. 11.4 - 1. If V represents volume, write a mathematical...Ch. 11.4 - Prob. 2CPCh. 11.4 - 3. True or false: In solving a related-rates...Ch. 11.4 - Prob. 1ECh. 11.4 - In Problems 1-4, find using the given values.
2....Ch. 11.4 - Prob. 3ECh. 11.4 - Prob. 4ECh. 11.4 - Prob. 5ECh. 11.4 - Prob. 6ECh. 11.4 - Prob. 7ECh. 11.4 - Prob. 8ECh. 11.4 - Prob. 9ECh. 11.4 - Prob. 10ECh. 11.4 - Prob. 11ECh. 11.4 - Prob. 12ECh. 11.4 - 13. The radius of a circle is increasing at a rate...Ch. 11.4 - Prob. 14ECh. 11.4 - Prob. 15ECh. 11.4 - Prob. 16ECh. 11.4 - 17. Profit Suppose that the daily profit (in...Ch. 11.4 - 18. Profit Suppose that the monthly revenue and...Ch. 11.4 - Prob. 19ECh. 11.4 - Supply The supply function for a product is given...Ch. 11.4 - Prob. 21ECh. 11.4 - Prob. 22ECh. 11.4 - Tumor growth For Problems 23 and 24, suppose that...Ch. 11.4 - Tumor growth For Problems 23 and 24, suppose that...Ch. 11.4 - 25. Allomelric relationships—fish For many species...Ch. 11.4 - Prob. 26ECh. 11.4 - Prob. 27ECh. 11.4 - Prob. 28ECh. 11.4 - Prob. 29ECh. 11.4 - 30. Water purification Assume that water is being...Ch. 11.4 - Prob. 31ECh. 11.4 - 32. Boat docking Suppose that a boat is being...Ch. 11.4 - 33. Ladder safety A 30-ft ladder is leaning...Ch. 11.4 - 34. Flight A kite is 30 ft high and is moving...Ch. 11.4 - 35. Flight A plane is flying at a constant...Ch. 11.4 - 36. Distance Two boats leave the same port at the...Ch. 11.4 - 37. Distance Two cars are approaching an...Ch. 11.4 - 38. Water depth Water is flowing into a barrel in...Ch. 11.4 - Prob. 39ECh. 11.5 - 1. Write the formula for point elasticity, .
Ch. 11.5 - 2. (a) If , the demand is called _______.
(b) If...Ch. 11.5 - Prob. 3CPCh. 11.5 - Prob. 4CPCh. 11.5 - Prob. 1ECh. 11.5 - Prob. 2ECh. 11.5 - In Problems 1 -8, p is in dollars and q is the...Ch. 11.5 - In Problems 1 -8, p is in dollars and q is the...Ch. 11.5 - In Problems 1 -8, p is in dollars and q is the...Ch. 11.5 - In Problems 1 -8, p is in dollars and q is the...Ch. 11.5 - Prob. 7ECh. 11.5 - In Problems 1 -8, p is in dollars and q is the...Ch. 11.5 - 9. Suppose the demand function for a product is...Ch. 11.5 - 10. Suppose the weekly demand function for a...Ch. 11.5 - In Problems 11 and 12, the demand functions for...Ch. 11.5 - In Problems 11 and 12, the demand functions for...Ch. 11.5 - Prob. 15ECh. 11.5 - Prob. 16ECh. 11.5 - Prob. 17ECh. 11.5 - Prob. 18ECh. 11.5 - In Problems 15-24, p is the price per unit in...Ch. 11.5 - In Problems 15-24, p is the price per unit in...Ch. 11.5 - In Problems 15-24, p is the price per unit in...Ch. 11.5 - Prob. 22ECh. 11.5 - In Problems 15-24, p is the price per unit in...Ch. 11.5 - Prob. 24ECh. 11 - In Problems 1-12, find the derivative of each...Ch. 11 - Prob. 2RECh. 11 - Prob. 3RECh. 11 - In Problems 1-12, find the derivative of each...Ch. 11 - Prob. 5RECh. 11 - Prob. 6RECh. 11 - Prob. 7RECh. 11 - Prob. 8RECh. 11 - Prob. 9RECh. 11 - Prob. 10RECh. 11 - Prob. 11RECh. 11 - Prob. 12RECh. 11 - Prob. 13RECh. 11 - Prob. 14RECh. 11 - Prob. 15RECh. 11 - Prob. 16RECh. 11 - Prob. 17RECh. 11 - Prob. 18RECh. 11 - In Problems 15-20, find the indicated...Ch. 11 - Prob. 20RECh. 11 - Prob. 21RECh. 11 - Prob. 22RECh. 11 - Prob. 23RECh. 11 - Prob. 24RECh. 11 - Prob. 25RECh. 11 - Prob. 26RECh. 11 - Prob. 27RECh. 11 - Prob. 28RECh. 11 - 29. Radioactive decay A breeder reactor converts...Ch. 11 - Prob. 30RECh. 11 - Prob. 31RECh. 11 - Prob. 32RECh. 11 - Prob. 33RECh. 11 - Prob. 34RECh. 11 - Prob. 38RECh. 11 - Prob. 39RECh. 11 - 37. Elasticity Suppose the weekly demand function...Ch. 11 - Prob. 41RECh. 11 - Prob. 35RECh. 11 - Prob. 36RECh. 11 - Prob. 37RECh. 11 - In Problems 1-8, find the derivative of each...Ch. 11 - Prob. 2TCh. 11 - Prob. 3TCh. 11 - Prob. 4TCh. 11 - Prob. 5TCh. 11 - In Problems 1-8, find the derivative of each...Ch. 11 - In Problems 1-8, find the derivative of each...Ch. 11 - In Problems 1-8, find the derivative of each...Ch. 11 - Prob. 9TCh. 11 - Prob. 10TCh. 11 - Prob. 11TCh. 11 - 12. Suppose the weekly revenue and weekly cost...Ch. 11 - Prob. 13TCh. 11 - Prob. 14TCh. 11 - Prob. 15TCh. 11 - Prob. 16TCh. 11 - Prob. 17TCh. 11 - Prob. 19T
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