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terrasami2330
24.02.2021 •
Mathematics
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?
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Ответ:
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
Ответ: