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April 18, 2015

April 18, 2015

Posted by **Kim** on Sunday, March 9, 2014 at 9:56pm.

L(t) = 12 + 2.8 sin[(2π/365)(t − 80)].

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

- Calculus Help -
**Steve**, Monday, March 10, 2014 at 5:11am3/31: t=90

4/21: t=111

L'(t) = 2.8cos[(2π/365)(t − 80)](2π/365)

now just plug in t=90 and t=111

The answer, of course, will be in hr/day.

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