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?

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is