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24-02-2021
Mathematics

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The number of bacteria in a culture is increasing according to the law of exponential growth. After 3 hours, there are 200 bacteria, and after 5 hours, there are 800 bacteria. How many bacteria will there be after 7 hours?

Respuesta :

24-02-2021

Answer:

Step-by-step explanation:

200(1+r)⁵⁻³ = 200(1+r)² = 800

(1+r)² = 4

1+r = 2

r = 100%

800(1+r)⁷⁻⁵ = 800·2² = 3200

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