Dave drinks a 12-ounce cup of coffee each morning on his way to work. This cup of coffee contains
136 mg of caffeine. The half-life of caffeine in a typical adult is 5.5 hours.
What is the meaning of the y-intercept of the function modeling the caffeine in Dave's
system?
About how much caffeine remains in Dave's system 4 hours later when he goes to lunch?
About how much caffeine remains in Dave's system 8 hours later after work?
Assuming Dave has no more caffeine after drinking his cup on Friday, when will the amount
of caffeine in his system be less than 1 mg?
When will the amount of caffeine reach O mg?
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Justify your reasoning.