The number of farms in the United States t years after 1925 is f(t) million, where...

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The number of farms in the United States t years after 1925 is f(t) million, where f is the function graphed in Fig. 26(a). [The graphs of f'(t) and f"(t) are shown in Fig. 26(b).] 6 5 4 3 2 1 y 0 (1925) 10 20 y=f(t) t 40 30 40 50 60 70 (a) 20 30 0 -.05 -.1 Y Figure 26 10 20 30 40 50 60 70 y=f"(t) y = f'(t) (b) (a) Approximately how many farms were there in 1990? (b) At what rate was the number of farms declining in 1990? (c) In what year were there about 6 million farms? (d) When was the number of farms declining at the rate of 60,000 farms per year? (e) When was the number of farms declining fastest? The number of farms in the United States t years after 1925 is f(t) million, where f is the function graphed in Fig. 26(a). [The graphs of f'(t) and f"(t) are shown in Fig. 26(b).] 6 5 4 3 2 1 y 0 (1925) 10 20 y=f(t) t 40 30 40 50 60 70 (a) 20 30 0 -.05 -.1 Y Figure 26 10 20 30 40 50 60 70 y=f"(t) y = f'(t) (b) (a) Approximately how many farms were there in 1990? (b) At what rate was the number of farms declining in 1990? (c) In what year were there about 6 million farms? (d) When was the number of farms declining at the rate of 60,000 farms per year? (e) When was the number of farms declining fastest?

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