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1. The population of the world in 2003 was 6.314 billion. It grew between 1975 and 2003 at an annual rate of 1.6%. Assume that

1. The population of the world in 2003 was 6.314 billion. It grew

between 1975 and 2003 at an annual rate of 1.6%. Assume that it

continues to grow at this rate.

a. Compute the doubling time.

b. Estimate the world population in 2048 and 2093 (assuming all

other things remain unchanged).

2. With a world population in 2003 of 6.314 billion and a projected

population growth rate of 1.1% instead (which is the United

Nations' projection for the period 2003 to 2015).

a. Compute the doubling time.

b. State the year in which the world's population would be

12.628 billion.

3. Suppose a country's population grows at the rate of 2% per year

and its output grows at the rate of 3% per year.

a. Calculate its rate of growth of per capita output.

b. If instead its population grows at 3% per year and its output

grows at 2% per year, calculate its rate of growth of per

capita output.

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