Practical Business Math Procedures
12th Edition
ISBN: 9781259540554
Author: Jeffrey Slater, Sharon Wittry
Publisher: McGraw-Hill Education
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Chapter 5, Problem 26ECP
To determine
The number of discouraged unemployed workers in the previous year.
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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
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2 ALASKA
0.4493186 OKLAHOMA
k
5
4
3 ARIZONA
0.707914 KANSAS
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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
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INDIANA
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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 5 Solutions
Practical Business Math Procedures
Ch. 5.1 - Write equations for the following (use the letter...Ch. 5.1 - Solve the following:
B + 24 = 60
D + 3D = 240
12B...Ch. 5.1 - Write equations for the following (use the letter...Ch. 5.1 - Solve the following:
B + 14 = 70
D + 4D = 250
11B...Ch. 5.1 - Prob. 1AHCh. 5.1 - Prob. 2AHCh. 5.2 - An L. L. Bean sweater was reduced $30. The sale...Ch. 5.2 - Kelly Doyle budgets of her yearly salary for...Ch. 5.2 - Micro Knowledge sells 5 times as many computers as...Ch. 5.2 - Susie and Cara sell stoves at Elliott’s...
Ch. 5.2 - Prob. 5PQCh. 5.2 - Prob. 6PQCh. 5.2 - Prob. 1EPQCh. 5.2 - Prob. 2EPQCh. 5.2 - Prob. 3EPQCh. 5.2 - Prob. 4EPQCh. 5.2 - Prob. 5EPQCh. 5.2 - Prob. 6EPQCh. 5.2 - Prob. 1AHCh. 5.2 - Prob. 2AHCh. 5.2 - Prob. 3AHCh. 5.2 - Prob. 4AHCh. 5.2 - Prob. 5AHCh. 5.2 - Prob. 6AHCh. 5.2 - Prob. 7AHCh. 5.2 - Prob. 8AHCh. 5.2 - Prob. 9AHCh. 5.2 - In 2016, Tony Rigato, owner of MRM, saw an...Ch. 5 - Prob. 1ECPCh. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Prob. 4ECPCh. 5 - Prob. 5ECPCh. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Prob. 8ECPCh. 5 - Prob. 9ECPCh. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Prob. 11ECPCh. 5 - Prob. 12ECPCh. 5 - Jessica and Josh are selling Entertainment Books...Ch. 5 - Prob. 14ECPCh. 5 - Dots sells T-shirts ($2) and shorts ($4). In...Ch. 5 - Dots sells a total of 250 T-shirts ($2) and shorts...Ch. 5 - Prob. 17ECPCh. 5 - Prob. 18ECPCh. 5 - Prob. 19ECPCh. 5 - Prob. 20ECPCh. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Prob. 22ECPCh. 5 - On a flight from Boston to San Diego, American...Ch. 5 - Prob. 24ECPCh. 5 - Bill’s Roast Beef sells 5 times as many sandwiches...Ch. 5 - Prob. 26ECPCh. 5 - Prob. 27ECPCh. 5 - Prob. 28ECPCh. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Solve the unknown from the following equations: LU...Ch. 5 - Prob. 31ECPCh. 5 - Solve the unknown from the following...Ch. 5 - If Colorado Springs, Colorado, has 1.2 times as...Ch. 5 - Prob. 34ECPCh. 5 - Prob. 35ECPCh. 5 - Prob. 36ECPCh. 5 - Prob. 37ECPCh. 5 - Prob. 38ECPCh. 5 - Prob. 39ECPCh. 5 - Prob. 40ECPCh. 5 - Prob. 41ECPCh. 5 - Prob. 42ECPCh. 5 - Prob. 43ECPCh. 5 - Prob. 1PTCh. 5 - Prob. 2PTCh. 5 - Prob. 3PTCh. 5 - Working at Staples, Jill Reese and Abby Lee sold a...Ch. 5 - Prob. 5PTCh. 5 - Prob. 6PT
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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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