Health Expenditures National health expenditures (in billions of dollars) from 1980 to 1998 are given by the function f(t) in Fig. 5.
(a) How much money was spent in 1987?
(b) Approximately how fast were expenditures rising in 1987?
(c) When did expenditures reach $1 trillion?
(d) When were expenditures rising at the rate of $100 billion per year?
Figure 5
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