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Sidana [21]
3 years ago
6

The house sparrows population has decreased by 41% since 1977. The population is now approximately 6.5 million pairs of birds. W

hat was the estimated sparrow population in 1977?
Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
5 0
Let x be estimated population in 1977

x - 0.41x  = 6,500,000
 x = (6,500,000 / 0.59

Answer is approximately 11,017,000  

11 million
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Answer:

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Step-by-step explanation:

ΔBEC ~ ΔAED so ...

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Substituting given numbers (lengths in centimeters), we have ...

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Then the unknown sides are ...

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