Question

Medicine taken by a patient breaks down and eventually leaves the patient’s system. Suppose a dose of 60 milligrams (mg) of medicine is given and it breaks down such that 20% of the medicine becomes ineffective every hour. How much of the 60 mg dose is still active after 3 hours, after 4.25 hours, after 6 hours?

Answer 1

after 3 hours :24mg left

after 4.25 hours:9 mg left

after 6 hours left

Step-by-step explanation:y for left mass of medicine

x for hour

y=60-20%*60 x y=60-12x

1.y=60-12*3=60-36=24

2.y=60-12*4.25=60-51=9

3.y=60-12*6=-12<0 No medicine is left.

y=