a. Individuals who have severe allergies (for example, to bee stings or peanut butter) often carry an EpiPen. It is a self-injecting device that delivers a single dose of 0.3 mg of epinephrine. Epinephrine (more familiarly known as adrenaline) is a hormone that responds to stress by increasing heart rate and blood pressure and boosting the supply of oxygen and energy-giving glucose to the blood and brain. Suppose the body loses 21% of the Epinephrine every hour. Find the amount of Epinephrine left in the body after 3 hours.

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