About 4000 new species of marine animals are discovered in the last two years. What is the unit rate of discovery

Answer 1

To find the unit rate of discovery, divide the total number of new species discovered (4000) by the number of years it took to discover them (2):

Unit rate = Total number of new species discovered / Number of years
Unit rate = 4000 / 2 = 2000

Therefore, the unit rate of discovery is 2000 new species of marine animals per year.