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?
1 answer:
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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