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

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Chapter1: Functions And Models
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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
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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 Insert Delete FS F6 FB F9 F11 F12 %24 & Backspace 5 %3D E R T Y D F G H K L B All 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 5 6 8 E R Y P D G H J K C V B Alt Ciri V しの Σ ト
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