Answer
(a) $f(8)=24\ units$
(b) increasing from 0 to 2 hr, decreasing from 2 to 12 hr.
(c) 2 hr, 64 units.
(d) 8 hours
(e) See explanations.
Work Step by Step
(a) At 8 hr, read from the curve, we have $f(8)=24\ units$
(b) the level of the drug in the bloodstream was increasing from 0 to 2 hr, decreasing from 2 to 12 hr.
(c) the drug in the bloodstream reach its maximum value at about 2 hr with a value of 64 units.
(d) From 2 hr (maximum) to 10 hr (16 units), it takes 8 hours additional.
(e) Answer may vary. An example could be: the level of the drug increases rapidly from 0 to 2 hours after injection. Then the level decreases slowly over a long period of time from 2 to 12 hours.
