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Calc..Help Please

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A model for the length of daylight (in hours) in Philadelphia on the t th day of the year is

L(t)= 12+2.8 sin[2pi/365(t-80)]

Use this model to compare how the number of hours of daylight is increasing in Philadelphia on March 21 and May 21. (Assume there are 365 days in a year. Round your answers to four decimal places.

March 21 L'(t)= ?
May 21 L'(t)=?

I found;

  • Calc..Help Please - ,

    I get the same derivative.
    You can post your numerical answer for a check if you wish.

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