Which of the following statements is true about heart rate and exercise? a. it is best to exercise your heart as hard as possible. b. maximum heart rate can be calculated by taking 220 minus your age. c. your recommended exercise heart rate is 30% of your maximum heart rate. d. all of the above are true statements.

22. which situation describes the appropriate use of drugs? a.using your friend’s prescription drug according to label instructions b.using an over-the-counter drug according to your friend’s instructions c.using an over-the-counter drug according to label instructions d.using your friend’s prescription drug according to your friend’s instructions