EBK FUND.OF DIFF.EQUATIONS+BOUNDARY...
7th Edition
ISBN: 9780321977175
Author: Nagle
Publisher: PEARSON CO
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Question
Chapter 2.6, Problem 39E
To determine
To solve:
The equation
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Microsoft Excel snapshot for random sampling: Also note the formula used for the last
column
02
x✓ fx =INDEX(5852:58551, RANK(C2, $C$2:$C$51))
A
B
1
No.
States
2
1
ALABAMA
Rand No.
0.925957526
3
2
ALASKA
0.372999976
4
3
ARIZONA
0.941323044
5
4 ARKANSAS
0.071266381
Random Sample
CALIFORNIA
NORTH CAROLINA
ARKANSAS
WASHINGTON
G7
Microsoft Excel snapshot for systematic sampling:
xfx INDEX(SD52:50551, F7)
A
B
E
F
G
1
No.
States
Rand No. Random Sample
population
50
2
1 ALABAMA
0.5296685 NEW HAMPSHIRE
sample
10
3
2 ALASKA
0.4493186 OKLAHOMA
k
5
4
3 ARIZONA
0.707914 KANSAS
5
4 ARKANSAS 0.4831379 NORTH DAKOTA
6
5 CALIFORNIA 0.7277162 INDIANA
Random Sample
Sample Name
7
6 COLORADO 0.5865002 MISSISSIPPI
8
7:ONNECTICU 0.7640596 ILLINOIS
9
8 DELAWARE 0.5783029 MISSOURI
525
10
15
INDIANA
MARYLAND
COLORADO
The spread of an infectious disease is often modeled using the following autonomous differential equation:
dI
-
- BI(N − I) − MI,
dt
where I is the number of infected people, N is the total size of the population being modeled, ẞ is a constant determining the rate of
transmission, and μ is the rate at which people recover from infection.
Close
a) (5 points) Suppose ẞ = 0.01, N = 1000, and µ = 2. Find all equilibria.
b) (5 points) For the equilbria in part a), determine whether each is stable or unstable.
c) (3 points) Suppose ƒ(I) = d. Draw a phase plot of f against I. (You can use Wolfram Alpha or Desmos to plot the function, or draw the
dt
function by hand.) Identify the equilibria as stable or unstable in the graph.
d) (2 points) Explain the biological meaning of these equilibria being stable or unstable.
Find the indefinite integral.
Check
Answer:
7x
4 + 1x
dx
Chapter 2 Solutions
EBK FUND.OF DIFF.EQUATIONS+BOUNDARY...
Ch. 2.2 - Prob. 1ECh. 2.2 - In Problems 1-6, determine whether the given...Ch. 2.2 - Prob. 3ECh. 2.2 - Prob. 4ECh. 2.2 - Prob. 5ECh. 2.2 - Prob. 6ECh. 2.2 - Prob. 7ECh. 2.2 - Prob. 8ECh. 2.2 - Prob. 9ECh. 2.2 - Prob. 10E
Ch. 2.2 - Prob. 11ECh. 2.2 - Prob. 12ECh. 2.2 - Prob. 13ECh. 2.2 - Prob. 14ECh. 2.2 - Prob. 15ECh. 2.2 - Prob. 16ECh. 2.2 - Prob. 17ECh. 2.2 - Prob. 18ECh. 2.2 - Prob. 19ECh. 2.2 - Prob. 20ECh. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.2 - Prob. 25ECh. 2.2 - Prob. 26ECh. 2.2 - Solutions Not Expressible in Terms of Elementary...Ch. 2.2 - Sketch the solution to the initial value problem...Ch. 2.2 - Prob. 29ECh. 2.2 - As stated in this section, the separation of...Ch. 2.2 - Interval of Definition. By looking at an initial...Ch. 2.2 - Analyze the solution y=(x) to the initial value...Ch. 2.2 - Prob. 33ECh. 2.2 - Prob. 34ECh. 2.2 - Prob. 35ECh. 2.2 - Prob. 36ECh. 2.2 - Prob. 37ECh. 2.2 - Prob. 38ECh. 2.2 - Prob. 39ECh. 2.2 - The atmospheric pressure force per unit area on a...Ch. 2.3 - In Problem 1-6, Determine whether the given...Ch. 2.3 - Prob. 2ECh. 2.3 - Prob. 3ECh. 2.3 - Prob. 4ECh. 2.3 - Prob. 5ECh. 2.3 - Prob. 6ECh. 2.3 - Prob. 7ECh. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - Prob. 10ECh. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - Prob. 12ECh. 2.3 - Prob. 13ECh. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 17-22, solve the initial value...Ch. 2.3 - In Problem 17-22, solve the initial value problem....Ch. 2.3 - In Problem 17-22, solve the initial value problem....Ch. 2.3 - Prob. 20ECh. 2.3 - Prob. 21ECh. 2.3 - Prob. 22ECh. 2.3 - Prob. 23ECh. 2.3 - Prob. 24ECh. 2.3 - Prob. 25ECh. 2.3 - Prob. 26ECh. 2.3 - Constant Multiples of Solutions. a. Show that y=ex...Ch. 2.3 - Prob. 29ECh. 2.3 - Prob. 30ECh. 2.3 - Discontinuous Coefficients. As we will see in...Ch. 2.3 - Prob. 32ECh. 2.3 - Prob. 33ECh. 2.3 - Prob. 34ECh. 2.3 - Mixing Suppose a brine containing 0.2kg of salt...Ch. 2.3 - Variation of Parameters. Here is another procedure...Ch. 2.3 - Prob. 37ECh. 2.3 - Prob. 38ECh. 2.3 - The Nobel Prize in Physiology or Medicine in 1963...Ch. 2.4 - Prob. 1ECh. 2.4 - Prob. 2ECh. 2.4 - Prob. 3ECh. 2.4 - Prob. 4ECh. 2.4 - Prob. 5ECh. 2.4 - Prob. 6ECh. 2.4 - Prob. 7ECh. 2.4 - Prob. 8ECh. 2.4 - Prob. 9ECh. 2.4 - Prob. 10ECh. 2.4 - Prob. 11ECh. 2.4 - Prob. 12ECh. 2.4 - Prob. 13ECh. 2.4 - Prob. 14ECh. 2.4 - Prob. 15ECh. 2.4 - Prob. 16ECh. 2.4 - Prob. 17ECh. 2.4 - Prob. 18ECh. 2.4 - Prob. 19ECh. 2.4 - In Problems 9-20, determine whether the equation...Ch. 2.4 - Prob. 21ECh. 2.4 - Prob. 22ECh. 2.4 - Prob. 23ECh. 2.4 - Prob. 24ECh. 2.4 - Prob. 25ECh. 2.4 - Prob. 26ECh. 2.4 - Prob. 27ECh. 2.4 - Prob. 28ECh. 2.4 - Prob. 29ECh. 2.4 - Consider the equation...Ch. 2.4 - Prob. 31ECh. 2.4 - Prob. 32ECh. 2.4 - Prob. 33ECh. 2.4 - Prob. 34ECh. 2.4 - Prob. 35ECh. 2.4 - Prob. 36ECh. 2.5 - Prob. 1ECh. 2.5 - Prob. 2ECh. 2.5 - Prob. 3ECh. 2.5 - Prob. 4ECh. 2.5 - Prob. 5ECh. 2.5 - Prob. 6ECh. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - Prob. 13ECh. 2.5 - Prob. 14ECh. 2.5 - Prob. 15ECh. 2.5 - Prob. 16ECh. 2.5 - Prob. 17ECh. 2.5 - Prob. 18ECh. 2.5 - Prob. 19ECh. 2.5 - Prob. 20ECh. 2.6 - Prob. 1ECh. 2.6 - Prob. 2ECh. 2.6 - Prob. 3ECh. 2.6 - Prob. 4ECh. 2.6 - In Problems 1 -8, identify do not solve the...Ch. 2.6 - In Problems 1 -8, identify do not solve the...Ch. 2.6 - Prob. 7ECh. 2.6 - In Problems 1 -8, identify do not solve the...Ch. 2.6 - Prob. 9ECh. 2.6 - Use the method discussed under Homogeneous...Ch. 2.6 - Prob. 11ECh. 2.6 - Prob. 12ECh. 2.6 - Prob. 13ECh. 2.6 - Prob. 14ECh. 2.6 - Prob. 15ECh. 2.6 - Prob. 16ECh. 2.6 - Prob. 17ECh. 2.6 - Prob. 18ECh. 2.6 - Prob. 19ECh. 2.6 - Use the method discussed under Equations of the...Ch. 2.6 - Prob. 21ECh. 2.6 - Prob. 22ECh. 2.6 - Prob. 23ECh. 2.6 - Prob. 24ECh. 2.6 - Prob. 25ECh. 2.6 - Prob. 26ECh. 2.6 - Prob. 27ECh. 2.6 - Prob. 28ECh. 2.6 - Prob. 29ECh. 2.6 - Prob. 30ECh. 2.6 - Use the method discussed under Equations with...Ch. 2.6 - Use method discussed under Equation with Linear...Ch. 2.6 - Prob. 33ECh. 2.6 - Prob. 34ECh. 2.6 - Prob. 35ECh. 2.6 - Prob. 36ECh. 2.6 - Prob. 37ECh. 2.6 - Prob. 38ECh. 2.6 - Prob. 39ECh. 2.6 - Prob. 40ECh. 2.6 - Prob. 41ECh. 2.6 - Prob. 42ECh. 2.6 - Prob. 43ECh. 2.6 - Prob. 44ECh. 2.6 - Prob. 45ECh. 2.6 - Prob. 46ECh. 2.6 - Prob. 47ECh. 2.6 - Prob. 48ECh. 2.RP - Prob. 1RPCh. 2.RP - Prob. 2RPCh. 2.RP - Prob. 3RPCh. 2.RP - Prob. 4RPCh. 2.RP - Prob. 5RPCh. 2.RP - Prob. 6RPCh. 2.RP - Prob. 7RPCh. 2.RP - Prob. 8RPCh. 2.RP - Prob. 9RPCh. 2.RP - Prob. 10RPCh. 2.RP - Prob. 11RPCh. 2.RP - Prob. 12RPCh. 2.RP - Prob. 13RPCh. 2.RP - Prob. 14RPCh. 2.RP - Prob. 15RPCh. 2.RP - Prob. 16RPCh. 2.RP - Prob. 17RPCh. 2.RP - Prob. 18RPCh. 2.RP - Prob. 19RPCh. 2.RP - Prob. 20RPCh. 2.RP - Prob. 21RPCh. 2.RP - In Problem 1-30, solve the equation....Ch. 2.RP - Prob. 23RPCh. 2.RP - Prob. 24RPCh. 2.RP - Prob. 25RPCh. 2.RP - Prob. 26RPCh. 2.RP - In Problems 1-30, solve the equation....Ch. 2.RP - Prob. 28RPCh. 2.RP - Prob. 29RPCh. 2.RP - Prob. 30RPCh. 2.RP - Prob. 31RPCh. 2.RP - Prob. 32RPCh. 2.RP - In Problems 31-40, solve the initial value problem...Ch. 2.RP - Prob. 34RPCh. 2.RP - Prob. 35RPCh. 2.RP - Prob. 36RPCh. 2.RP - Prob. 37RPCh. 2.RP - Prob. 38RPCh. 2.RP - Prob. 39RPCh. 2.RP - Prob. 40RPCh. 2.RP - Prob. 41RP
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- Suppose the Internal Revenue Service reported that the mean tax refund for the year 2022 was $3401. Assume the standard deviation is $82.5 and that the amounts refunded follow a normal probability distribution. Solve the following three parts? (For the answer to question 14, 15, and 16, start with making a bell curve. Identify on the bell curve where is mean, X, and area(s) to be determined. 1.What percent of the refunds are more than $3,500? 2. What percent of the refunds are more than $3500 but less than $3579? 3. What percent of the refunds are more than $3325 but less than $3579?arrow_forwardFind the indefinite integral. Check Answer: In(5x) dx xarrow_forwardHow to solve 2542000/64132 without a calculator?arrow_forward
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