SOLUTION: The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The formula relating Population "P"
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-> SOLUTION: The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The formula relating Population "P"
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Question 63237: The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The formula relating Population "P" in millions to year "Y" is given by the following formula:
P(in millions) = 250 x 2^(y - 1990)/66
What will the population of the United States be in 2025?
This problem has me very scared of Algebra 1B. I hope that someone can help me better understand this problem, because as of now, I am lost. Please help me.
You can put this solution on YOUR website! The rule relating the year and the population is
P(in millions) = 250 x 2^(y - 1990)/66
To find the population in the year 2025 substitute y=2025 in the formula above.
P(in millions) = 250 x 2^(2025 - 1990)/66
P(in millions) = 250 x 2^(35/66)
Type this into your calculator to get an answer of 361.
So the population in 2025 should be 361 million people.
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