<prompt> Growth rate is calculated by?Crude birth rateCrude death rateNet reproduction--Crude death rateTotal fertility rate--Crude death ratCrude birth rate - Crude death rate  <response>: ANSWER: D Crude birth rate - Crude death rateREF: Park 20th ed p. 412When crude death rate is substracted from crude birth rate, the net residual is the annual growth rate, exclusive of migration.Relation between growth rate and populationRatingAnnual rate of growth Number of years required for population to double itselfStationary populationNo growth Slow growth0.5139Moderate growth0.5 -1.070-139Rapid growth1.0-1.547-70Very rapid growth1.5-2.035-47Explosive growth2.0-2.528-35 2.5-3.023-28 3.0-3.520-23 3.5-4.018-20 