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i)How many students will be aware of the rumour after 7 days.

ii)How long will it take for 850 students to hear the rumour

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- Thread starter
- #1

i)How many students will be aware of the rumour after 7 days.

ii)How long will it take for 850 students to hear the rumour

- Mar 1, 2012

- 973

$(1000-r)$ = number who have not heard the rumor

$t$ is in days

$\dfrac{dr}{dt} = k \cdot r(1000-r)$, where $k$ is the constant of proportionality

you are given $r(0)=5$ and $r(1) = 10$

see what you can do from here …

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