MATH 110 Midterm: Exam 3 Solutions Spring 1995
14 Mar 2019
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1870s/1900, 2 billion 1950s, 6 billion 1990s/early 2000s. Name 1 country in the top 10 with highest natural increase rate. Name 1 country in the bottom 10 with lowest natural increase rate. In some regions the population is increasing while in others it is decreasing. Define the crude birth rate, crude death rate, crude rate of natural increase. Crude birth rate = cbr =1000* births/midyear pop. Number of births per 1000 people per year; Crude death rate = cdr =1000* deaths/midyear pop. Number of deaths in a given year per 1000 midyear population, cdr=d(t)/p(t)*1000; Crude rate of natural increase = crni = cbr-cdr- crude birth rate minus crude death rate. Pt = po + b d + i o. The population size is increasing but people are having fewer kids, so there is a bigger denominator (larger number of people) What is a sustainable population growth rate in the long term? zero.
