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Mathematics 9 Online
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) = 10 + 2.8sin((2π/365)t - 1.35) . How many hours of daylight are there on the 100th day of the year? Round the answer to the nearest tenth.

OpenStudy (anonymous):

@***[ISURU]*** can you help me with this one? i got 9.96 but its none of the answers the answers are: 9.4 9.6 11.0 12.4

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