Cigarette Use For the years 1965–2009, the percent p of adults who have tried cigarettes can be modeled by p = 43.3 − 0.504t, where t is the number of years after 1960.
a. Is the rate of change of the percent positive or negative?
b. How fast was the percent of adults who tried cigarettes during this period changing? Use the units in the problem in your answer.
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