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lys-0071 [83]
3 years ago
14

Se ha determinado que la población P (t) de una colonia de bacterias, t horas después de iniciar la observación, tiene una razón

de cambio de P'(t) = 350 e0.18t + 220 e-0.3t. Si la población era de 250,000 bacterias cuando se inició la observación, ¿Cuál será la población20 horas después?
Mathematics
1 answer:
maxonik [38]3 years ago
5 0

Answer:

La población 20 horas después será de 321,161 bacterias.

Step-by-step explanation:

t horas después de iniciar la observación, tiene una razón de cambio de P'(t) = 350 e0.18t + 220 e-0.3t.

Esto implica que la población después de t horas viene dada por:

P(t) = \int P^{\prime}(t) dt

P(t) = \int (350e^{0.18t} + 220e^{-0.3t}) dt

Teniendo en cuenta que

\int e^{at} dt = \frac{1}{a}e^{at}

P(t) = \int (350e^{0.18t} + 220e^{-0.3t}) dt

P(t) = \frac{350}{0.18}e^{0.18t} - \frac{220}{0.3}e^{-0.3t} + K

En que k es la población inicial, o sea, K = 250000. Entonces

P(t) = 1944.44e^{0.18t} -733.33e^{-0.3t} + 250000

¿Cuál será la población 20 horas después?

Esto eres P(20). Entonces:

P(20) = 1944.44e^{0.18*20} -733.33e^{-0.3*20} + 250000 = 321161

La población 20 horas después será de 321,161 bacterias.

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