1. If a nurse administers a dosage of medication following a rule that the dosage \( D \) in milligrams is given by \( D = 2t^2 + 3t - 5 \), where \( t \) is the time in hours since the patient's last dose, what is the dosage after 3 hours? A. 16 mg B. 20 mg C. 22 mg D. 24 mg Answer: C. \( D = 2(3)^2 + 3(3) - 5 = 18 + 9 - 5 = 22 \) mg. The quadratic formula represents the increasing dosage over time with a decreasing factor. 2. A patient's heart rate \( H \) in beats per minute is modeled by the linear equation \( H = 70 + 12a \), where \( a \) is the level of activity measured from 0 to 10. What is the heart rate at an activity level of 4? A. 118 bpm B. 128 bpm C. 138 bpm D. 148 bpm