D03 Math

Question 38

38. Use the following information to answer questions 38–40. A website about birds made the 4 claims below about American robins. 1. The population of American robins in 2015 was 320 million. 2. The wingspans of all American robins can be fit to a normal distribution model that has a mean of 36.00 cm and a standard deviation of 2.50 cm. 3. The maximum reported flight speed for an American robin is 3,168 feet per minute. 4. A certain conservation organization will only consider American robins threatened if the total number of American robins declines by at least 30% over a 10-year period. 38. Suppose the population of American robins increased each year from 2005 to 2015. The conservation organization will consider American robins threatened provided that their population in 2025 is no greater than what number?

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