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10+2.8sin((2*PI/365)*100-1.35)=
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(2pi/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. a.)9.4 hours
b.)9.7 hours
c.)11.0 hours
d.)12.4 hours
I plugged in 100 for t, but got an answer that was not one of the choices above. What am I doing wrong? Thanks!
1 answer
1 answer