Sustainable Energy
1st Edition
ISBN: 9781133108689
Author: Richard A. Dunlap
Publisher: Cengage Learning
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Chapter 2, Problem 4P
To determine
Calculate the time in the past at which the human population was 2.
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The population of a country doubles in 50 years. How many years will it be five times as much? Assume that
the rate of increase is proportional to the number of inhabitants.
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years (whole number)
The population of a certain country has grown at a rate proportional to the number of people in the country.at present,the country has 80 million inhabitants. Ten year ago it had 70 million assuming that this trend continues. Find an expression for the approximate number of people living in the country at any time(taking t=0 to be the present time )And the approximate number of people who will inhabit the country at the end of the next ten year period?
5. A population of 4 million inhabitants grows at a rate of 3% annually.Calculate the population size at the end of 5 years.
Chapter 2 Solutions
Sustainable Energy
Ch. 2 - A quantity has a doubling time of 110 years....Ch. 2 - The population of a particular country has a...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - The total world population in 2012 was about 7...Ch. 2 - The population of a state is 25,600 in the year...Ch. 2 - The population of a country as a function of time...Ch. 2 - Prob. 9P
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