In: Math
For the following exercises, use this scenario: The equation N(t) = 1200/1 + 199e−0.625t models the number of people in a school who have heard a rumor after t days.
To the nearest tenth, how many days will it be before the rumor spreads to half the carrying capacity?
Consider the population is written using the formula;
P(t) = 1200/(1 + 199e-0.625t)
The number of years its take for the population to reach half of its capacity is:
600 = 1200/(1 + 199e-0.625t)
600(1 + 199e-0.625t) = 1200
600 + 119400e-0.0625t = 1200
e-0.625t = (1200 – 600)/119400
e-0.625t = 0.005
Take natural log on both sides;
ln(e-0625t) = ln(0.005)
-0.625t = ln(0.005)
t = ln(0.005)/-0.625
= 8.5
Therefore, it takes 9 years its take for the population to reach half of its capacity.
Therefore, it takes 9 years its take for the population to reach half of its capacity.