The global population has been estimated to have been 5.267 billion in 1990 and 6.689 billion in 2008. (Assume those estimates are for Jan. 1 of the respective years.) a) Assume that human population follows the exponential growth model. Estimate the relative growth rate k. b) Use the exponential growth model to predict the global population in the year 2020 to the nearest million. c) Use the model to predict the year when the population reaches 8 billion. d) Again using the model, when the population reaches 8 billion, estimate the total growth of the global population in the next four months. Give your estimate to the nearest million. Explain how you are making your estimate. (There are at least two valid ways to come up with an estimate. Any valid method is acceptbale, provided you fully explain the method you are using.)
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
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Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
The global population has been estimated to have been 5.267 billion in 1990 and 6.689 billion in 2008. (Assume those estimates are for Jan. 1 of the respective years.)
a) Assume that human population follows the exponential growth model. Estimate the relative growth rate k.
b) Use the exponential growth model to predict the global population in the year 2020 to the nearest million.
c) Use the model to predict the year when the population reaches 8 billion.
d) Again using the model, when the population reaches 8 billion, estimate the total growth of the global population in the next four months. Give your estimate to the nearest million. Explain how you are making your estimate. (There are at least two valid ways to come up with an estimate. Any valid method is acceptbale, provided you fully explain the method you are using.)
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