For adults, a normal resting rate is 60 to 100 beats per minute. Athletes may have a rate as low as 40 bpm because their hearts are trained to efficiently pump blood. If your heart rate is consistently below 60 or above 100, you may have a heart condition, such as arrhythmia.
Integrating Factor. An integrating factor is a function by which an ordinary differential equation can be multiplied in order to make it integrable. For example, a linear first-order ordinary differential equation of type.
Factors are all the integers that divide evenly into another integer (whole number). They are what you get when you divide. The Greatest Common Factor is the largest integer that will divide evenly into any two or more integers. For example, let's take 24 and 30.