The populations of two countries are given for January 1, 2000, and for January 1, 2010. a. Write a function of the form P t = P 0 e k t to model each population P t (in millions) t years after January 1, 2000. (See Example 3) b. Use the models from part (a) to approximate the population on January 1, 2020, for each country. Round to the nearest hundred thousand. c. Australia had fewer people than Taiwan in the year 2000, yet from the result of part (b), Australia would have more people in the year 2020? Why? d. Use the models from part (a) to predict the year during which each population would reach 30 million if this trend continues.
The populations of two countries are given for January 1, 2000, and for January 1, 2010. a. Write a function of the form P t = P 0 e k t to model each population P t (in millions) t years after January 1, 2000. (See Example 3) b. Use the models from part (a) to approximate the population on January 1, 2020, for each country. Round to the nearest hundred thousand. c. Australia had fewer people than Taiwan in the year 2000, yet from the result of part (b), Australia would have more people in the year 2020? Why? d. Use the models from part (a) to predict the year during which each population would reach 30 million if this trend continues.
Solution Summary: The author calculates the population of Australia and Taiwan by using the exponential growth function P(t)=P_oekt
Global temperature increases are benchmarked to the average temperature between 1951 and 1980. In 2010, the global average
temperature was 0.72°C above the benchmark. In 2020, it was 1.02°C above.1
1climate.nasa.gov, accessed March 23, 2021.
(a) Assuming the difference between the global average temperature and the benchmark is a linear function of time, find a
formula for this function.
The increase in average global temperature, G, above the benchmark average in the year t is given by
G =
i
i
)t
eTextbook and Media
(b) Use this formula to predict the difference in 2027.
°C
The formula predicts that in the year 2027, the average global temperature will have increased by
over the benchmark.
The amount of domestic waste, W, in millions of metric tons, dumped in landfills dropped from 22.42 in 2001 to 2.17 in 2019 in
England.¹ Find a formula for W as a linear function of year t.
W =
+
Average Annual Wage The following table shows theU.S. average annual wage in thousands of dollars forselected years from 2014 and projected to 2050.a. Find a power function that models this data, with xequal to the number of years after 2000 and y equalto the average annual wage in thousands of dollars.Report the model with four significant digits.b. What does the model predict that the averageannual wage will be in 2043?c. Use technology to find when the model predicts thatthe average annual wage will be $159.6 thousand.
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