How many bird species will there be left in the year 2020 if in 1990, a rural area had 1200 bird species and are becoming extinct at the rate of 1.5% per decade (10 years)?
1 Answer
Nov 3, 2014
Since the number of bird species becomes 98.5% of a previous decade, in 2020 (3 decades after 1990), the number of the bird species will be
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