Cockroaches are exposed to a pesticide. After 3 hours, 95% of the insects are dead. Independent and Dependent Variable

Explanation:

Independent variable is the time

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.

c would be the answer