Friday

September 19, 2014

September 19, 2014

Posted by **Anonymous** on Sunday, April 5, 2009 at 8:58pm.

D(t)=12+Asin(((2pi)/(365))(t-80))

where A depends only on the latitude (and not t). for latitude 30 degress, A is about 2.3

1. When is the number of hours of daylight the greatest?

2.When is the number of hours of daylight the least?

3. When is the number of hours of daylight increasing at a rate of 2 minutes per day?

4. when is the number of hours of daylight decreasing at a rate of 2 min per day?

Can any one help me with any of these?

thanks a lot!

- calculus -
**bobpursley**, Sunday, April 5, 2009 at 9:05pmrepeat. I forgot on the last post, on 4 set dD/dt to minus 2/60.

- calculus -
**Anonymous**, Sunday, April 5, 2009 at 9:29pmthank you so much I appreciate this

**Answer this Question**

**Related Questions**

11th grade-Calculas - The number of hours of daylight D depends upon the ...

Calc..Help Please - A model for the length of daylight (in hours) in ...

Math - The number of daylight hours in a day is harmonic. Suppose that in a ...

Trigonometry - The number of daylight hours in a day is harmonic. Suppose that ...

math - In Philadelphia the number of hours of daylight on day t (where t is the ...

Precalculus II - 1. The number of hours of daylight D(t) in Halifax at day t can...

Calculus Help - A model for the length of daylight (in hours) in Philadelphia on...

Math- Trigonometry - The flowering of many commercially grown plants in ...

pre calc - Over the course of a year, the number of hours of daylight in ...

triginometry - hi i tried solving this problem but i get the second part wrong...