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May 25, 2015

Homework Help: Calc..Help Please

Posted by Nurcan on Monday, February 20, 2012 at 6:12pm.

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;
L'(t)=2.8cos(2pi/365(t-80))(2pi/365)

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