U.S. Population The population (in millions) of the United States (excluding Alaska and Ha...

U.S. Population The population (in millions) of the United States (excluding Alaska and Hawaii) t years after 1800 is given by the function f(t) in Figure(a). The graphs of f′(t) and f′(t) are shown in Figuer(b) and (c).

(a) What was the population in 1925?

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(b) Approximately when was the population 25 million?

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(c) How fast was the population growing in 1950?

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(d) When during the last 50 years was the population growing at the rate of 1.8 million people per year?

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(e) In what year was the population growing at the greatest rate?

Figure Population (in millions) of the United States from 1800 to 1998.