The growth of a population per unit time is calculated by using this formula: G = r × N. What is the quantity r and how is it calculated? Question 10 options: The quantity r is the biotic potential of a population and is calculated by adding the birth rate and the death rate. The quantity r is the exponential growth rate and is calculated by subtracting the number of deaths from the number of births. The quantity r is the per capita growth rate and is calculated by subtracting the number of deaths from the number of births. The quantity r is the per capita growth rate and is calculated by multiplying the number of births and the number of deaths. The quantity r is the monthly net increase of a population and is calculated by subtracting the number of births from the starting population size.
Added by Kelly C.
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Step 1: Understand the formula G = r × N, where G represents the growth of the population, r is a specific growth rate, and N is the current population size. Show more…
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We're really more interested in determining the population change during a particular time period. We are interested in calculating rates of change, which is the change in numbers (AN) as a function of time (At). Here, "change in" is represented by the Greek symbol delta (Δ), so ΔN represents the change in number. Calculating the change in number as a function of change in time allows us to determine how large the population will be at any time in the future. By convention, the number of births and deaths in a population is usually expressed per individual in the population. For example, in a population of marmots, 26 births in a population of 145 in a year would have a birth rate (b) of 26/145, or 0.18 per individual. Thus, the birth rate minus the death rate during a given time period, multiplied by the population size (N), would be the same as the differential and is called rN. This is used to determine the change in population from year to year. Given a global human population of 3.5 billion, a birth rate per year of 0.40, and a death rate per year of 0.23, what would be the population after x years? Assume the per capita growth rate does not change. Enter your answer in scientific notation.
Shaiju T.
Yujie W.
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