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Alexxx [7]
3 years ago
12

Scientists researching amphibians put tags on 30 frogs in a wetland area. Later, the scientists captured 520 frogs, of which 12

had tags. To the nearest whole number, what is the best estimate for the frog population?
Mathematics
1 answer:
aleksklad [387]3 years ago
5 0

Answer:

I THINK THE ANSWER IS d or e

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A city that had 40,000 trees started losing them at a rate of 10 percent per year because of urbanization.
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Answer:

t = 13.1576  years

Step-by-step explanation:

The situation can be modeled as

P = Po.(1-r)^t

Where

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r is the rate of change

Po = 40000

r = 10% equivalent to 0.1

Now

A quarter of the original amount

(1/4)*Po = Po.(1-r)^t

(1/4) = (0.9)^t

t = 13.1576

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Step-by-step explanation:

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\:  \:  \:  \:  \:  \:  \:

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