Concept explainers
In any given locality, the length of daylight varies during the year. In Des Moines, lowa, the number of minutes of daylight in a day
(Source :School Science and Mathematics.)
Graph the function in the window
How many minutes of daylight are there on February
Use the fact that the value of the sine function ranges from
Use the TRACE feature or the MINIMUM command to estimate the day with the shortest amount of daylight. Find the exact day algebraically by using the fact that
Use the TRACE feature or the MAXIMUM command to estimate the day with the longest amount of daylight. Find the exact day algebraically by using the fact that
Find the two days during which the amount of daylight equals the amount of darkness. (These days called equinoxes.) [Note: Answer this question both graphically and algebraically.]
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Mylab Math With Pearson Etext -- 18 Week Standalone Access Card -- For Calculus & Its Applications
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