following table gives the percent of the US population living in urban areas as a function of year.1 Year 1800 1830 1860 1890 1920 Percent 6.0 9.0 19.8 35.1 51.2 Year 1950 1980 1
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
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
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 following table gives the percent of the US population living in urban areas as a function of year.1
| Year | 1800 | 1830 | 1860 | 1890 | 1920 |
|---|---|---|---|---|---|
| Percent | 6.0 | 9.0 | 19.8 | 35.1 | 51.2 |
| Year | 1950 | 1980 | 1990 | 2000 | 2005 |
| Percent | 64.0 | 73.7 | 75.2 | 79.0 | 79.0 |
a) Find the average rate of change of the percent of the population living in urban areas between 1800 and 1950.
Round your answer to three decimal places.
The average rate of change is ? percent/year.
(b) Estimate the rate at which this percent is increasing at the year 1990.
Round your answer to three decimal places.
The rate of increase at the year 1990 is ? percent/year.
(c) Estimate the rate of change of this function for the year 1830.
Round your answer to three decimal places.
The rate of change in the year 1830 is ? percent/year.
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