For example, some inexpensive mowers are designed to have a service life of 200 or fewer hours while pricier mowers typically are designed to last 500 or more hours. Therefore, a lawnmowerâs life expectancy can be based on how often and how long it is used.
exponential growth. Increase in number or size, at a constantly growing rate. It is one possible result of a reinforcing feedback loop that makes a population or system grow (escalate) by increasingly higher amounts. Compound interest is an example of exponential growth. Use 'exponential growth' in a Sentence.
Population growth is a change in population size during a particular time period. In the simplest calculation, growth rate is equal to [P(t2) - P(t1)]/P(t1), where P(t1) is a past population value and P(t2) is the present population. This calculation yields a growth rate for any chosen time range.