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OpenStudy (anonymous):
The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of hours of daylight t days into the year: f(t)=11+2.2sin((2(pi)/365)t-1.25). How many hours of daylight are there on the twelfth day of the year? Round the answer to the nearest tenth. Please help
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