Figure 1.11 shows the amount of nicotine, N = f(t), in mg, in a person’s bloodstream as a function of the time, t, in hours, since the person finished smoking a cigarette. 

(a) Estimate f(3) and interpret it in terms of nicotine. 

(b) About how many hours have passed before the nicotine level is down to 0.1 mg? 

(c) What is the vertical intercept? What does it represent in terms of nicotine? 

(d) If this function had a horizontal intercept, what would it represent?

Figure 1.11

Transcribed Image Text:

N (mg) 0.5 0.4 0.3 0.2 0.1 0 1-1-- 1 2 3 4 5 6 t (hours)