Concept explainers
Hours of Daylight According to the Old Farmer's Almanac, in Detroit, Michigan, the number of hours of sunlight on the summer solstice of 2015 was , and the number of hours of sunlight on the winter solstice was .
(a) Find a sinusoidal function of the form that models the data.
(b) Use the function found in part to predict the number of hours of sunlight on April 1, the 91st day of the year.
(c) Draw a graph of the function found in part .
(d) Look up the number of hours of sunlight for April 1 in the Old Farmer’s Almanac, and compare the actual hours of daylight to the results found in part .
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