A person measures his or her pulse rate by counting the number of beats in (30 \pm 0.5) s. For this problem you can approximate the percent uncertainty in a product or quotient of quantities as the sum of the percent uncertainty in each quantity. If (35 \pm 3) beats are counted what is the percent uncertainty in the person's pulse rate? The pulse rate is the number of beats per unit time, usually expressed as beats per minute.

A person measures his or her pulse rate by counting the number of beats in (30 \pm 0.5) s. For this problem you can approximate the percent uncertainty in a product or quotient of quantities as the sum of the percent uncertainty in each quantity. If (35 \pm 3) beats are counted what is the percent uncertainty in the person's pulse rate? The pulse rate is the number of beats per unit time, usually expressed as beats per minute.