Sociologists model the spread of rumors using logistic equations. The key assumption is that at any given time a fraction y of the population, where 0sys1, knows the rumor, while the remaining fraction 1-y does not. Furthermore, the rumor spreads by interactions between those who know the rumor and those who do not. The number of such interactions is proportional to y(1-y). Therefore, the equation that describes the spread of the rumor is y'(t) = ky(1-y), where k is a positive real number. The fraction of people who initially know the rumor is y(0) = Yo, where 0sy, s1. Complete parts (a) to (c) below. ...... Substitute C back into the found general solution. Yo (Simplify your answer.) "(1-Y0) *Yo 0.3 which means b. Assume k = 0.3 weeks and graph the solution for yo -0.3 and yo =0.7. Which of the following graphs shows the solution for yo =0.3 weeks in blue (the lower plot) and the solution for y, =0.7 in red (the upper plot)? O A. B. OC. OD. Textbook Similar question Print P Pearson 1:16 PM ENG 11/13/2021 DELL
Sociologists model the spread of rumors using logistic equations. The key assumption is that at any given time a fraction y of the population, where 0sys1, knows the rumor, while the remaining fraction 1-y does not. Furthermore, the rumor spreads by interactions between those who know the rumor and those who do not. The number of such interactions is proportional to y(1-y). Therefore, the equation that describes the spread of the rumor is y'(t) = ky(1-y), where k is a positive real number. The fraction of people who initially know the rumor is y(0) = Yo, where 0sy, s1. Complete parts (a) to (c) below. ...... Substitute C back into the found general solution. Yo (Simplify your answer.) "(1-Y0) *Yo 0.3 which means b. Assume k = 0.3 weeks and graph the solution for yo -0.3 and yo =0.7. Which of the following graphs shows the solution for yo =0.3 weeks in blue (the lower plot) and the solution for y, =0.7 in red (the upper plot)? O A. B. OC. OD. Textbook Similar question Print P Pearson 1:16 PM ENG 11/13/2021 DELL
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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![Sociologists model the spread of rumors using logistic equations. The key assumption is that at any given time a fraction y of the population, where 0sys1, knows
the rumor, while the remaining fraction 1-y does not. Furthermore, the rumor spreads by interactions between those who know the rumor and those who do not. The
number of such interactions is proportional to y(1-y). Therefore, the equation that describes the spread of the rumor is y'(t) = ky(1 - y), where k is a positive real
number. The fraction of people who initially know the rumor is y(0) = y0, where 0 sy, s1. Complete parts (a) to (c) below.
.....
Substitute C back into the found general solution.
Yo
y =
(Simplify your answer.)
e - (1-Yo) *Yo
kt
0.3
which means
weeks
-1
b. Assume k = 0.3 weeks
and graph the solution for y, = 0.3 and yo = 0.7. Which of the following graphs shows the solution for y, =0.3
Yo
in blue (the lower plot) and the solution for y, = 0.7 in red (the upper plot)?
OA.
YB.
OC.
OD.
Q
AX
Q
Textbook
Print
Similar question
P Pearson
1:16 PM
ENG
全
11/13/2021
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Transcribed Image Text:Sociologists model the spread of rumors using logistic equations. The key assumption is that at any given time a fraction y of the population, where 0sys1, knows
the rumor, while the remaining fraction 1-y does not. Furthermore, the rumor spreads by interactions between those who know the rumor and those who do not. The
number of such interactions is proportional to y(1-y). Therefore, the equation that describes the spread of the rumor is y'(t) = ky(1 - y), where k is a positive real
number. The fraction of people who initially know the rumor is y(0) = y0, where 0 sy, s1. Complete parts (a) to (c) below.
.....
Substitute C back into the found general solution.
Yo
y =
(Simplify your answer.)
e - (1-Yo) *Yo
kt
0.3
which means
weeks
-1
b. Assume k = 0.3 weeks
and graph the solution for y, = 0.3 and yo = 0.7. Which of the following graphs shows the solution for y, =0.3
Yo
in blue (the lower plot) and the solution for y, = 0.7 in red (the upper plot)?
OA.
YB.
OC.
OD.
Q
AX
Q
Textbook
Print
Similar question
P Pearson
1:16 PM
ENG
全
11/13/2021
DELL
F4
F7
F10
Priscr
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Delete
FS
F6
FB
F9
F11
F12
%24
&
Backspace
5
%3D
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Car
![c. Describe and interpret the long-term behavior of the rumor function for any 0syo s1.
For any 0sy, <1, lim y(t) = 1 . (Type an integer or a simplified fraction.)
Which of the following is the correct interpretation?
O A. Although more and more people know the rumor as time goes on, there are always some people who do not know the rumor.
O B. As time goes on, the number of people who know the rumor increases without bound.
C. Eventually, everyone knows the rumor.
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Transcribed Image Text:c. Describe and interpret the long-term behavior of the rumor function for any 0syo s1.
For any 0sy, <1, lim y(t) = 1 . (Type an integer or a simplified fraction.)
Which of the following is the correct interpretation?
O A. Although more and more people know the rumor as time goes on, there are always some people who do not know the rumor.
O B. As time goes on, the number of people who know the rumor increases without bound.
C. Eventually, everyone knows the rumor.
Textbook
Print
Similar
P Pearson
ENG
DELL
F12
Inse
23
$
%
&
4
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8
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P
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G
H
J
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C
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