The Speed of Traffic Flow on a Certain Highway Between

question 66

Essay

The speed of traffic flow on a certain highway between 6 A.M. and 10 A.M. on a typical weekday is approximated by the functon where is measured in miles per hour and t is measured in hours, with corresponding to 6 A.M. Find the interval where f is increasing, the interval where f is decreasing, and the relative extrema of f. Interpret your results.

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Definitions:

19th Century

the period from January 1, 1801, to December 31, 1900, marked by significant industrial, social, and political changes worldwide.

GNI Per Capita

Gross National Income per capita is a measure dividing the country's GNI by its population, providing an average economic income per person.

Purchasing Power

The quantity and quality of goods and services that can be bought with a unit of currency.

Birth Rates

The number of live births per thousand of the population per year, a key demographic indicator.