Prairie Dogs and Black-Footed Ferrets In Exercises 15-16, consider a predator-prey relationship involving black-footed ferrets (predators) and prairie dogs (prey). Let xrepresent the number of prairie dogs, let yrepresent the number of black-footed ferrets, and let trepresent the time in months. Assume that the following predator-prey equations model the rates of change of each population.
When
Find the critical points of the predator-prey equations.
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Chapter 6 Solutions
Calculus: Early Transcendental Functions
- Grazing Rabbits and Sheep This is a continuation of Exercise 21. In addition to the kangaroos, the major grazing mammals of Australia include merino sheep and rabbits. For sheep, the functional response is S=2.82.8e0.01V, and for rabbits, it is H=0.20.2e0.008V, Here S and H are the daily intake measured in pounds, and v is the vegetation biomass measured in pounds per acre. a. Find the satiation level for sheep and that for rabbits. b. One concern in the management of rangelands is whether the various species of grazing animals are forced to complete for food. It is thought that competition will not be a problem if the vegetation biomass level provides at least 90 of the satiation level for each species. What biomass level guarantees that competition between sheep and rabbits will not be problem?arrow_forwardMilk Production Milk production M (in billions of pounds) in the United States from 2000 through 2014 can be modeled by M=3.00t+163.3,0t14 where t represents the year, with t = 0 corresponding to 2000. (a) According to the model, when was the annual milk production greater than 180 billion pounds, but no more than 190 billion pounds? (b) Use the model to predict when milk production will exceed 230 billion pounds.arrow_forward
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