Answer:
3/4
Step-by-step explanation:
Answer:
9.3 hours
Step-by-step explanation:
Given
![y = 2.89\sin(0.0145x-1.40) + 10.99.](https://tex.z-dn.net/?f=y%20%3D%202.89%5Csin%280.0145x-1.40%29%20%2B%2010.99.)
Required
Hours of sunlight on Feb 21, 2013
First, calculate the number of days from Jan 1, 2013 to Feb 21, 2013
![days = 52](https://tex.z-dn.net/?f=days%20%3D%2052)
So:
![x = 52](https://tex.z-dn.net/?f=x%20%3D%2052)
So, we have:
![y = 2.89\sin(0.0145x-1.40) + 10.99.](https://tex.z-dn.net/?f=y%20%3D%202.89%5Csin%280.0145x-1.40%29%20%2B%2010.99.)
![y = 2.89\sin(0.0145*52-1.40) + 10.99.](https://tex.z-dn.net/?f=y%20%3D%202.89%5Csin%280.0145%2A52-1.40%29%20%2B%2010.99.)
![y = 2.89\sin(0.754-1.40) + 10.99.](https://tex.z-dn.net/?f=y%20%3D%202.89%5Csin%280.754-1.40%29%20%2B%2010.99.)
![y = 2.89\sin(-0.646) + 10.99.](https://tex.z-dn.net/?f=y%20%3D%202.89%5Csin%28-0.646%29%20%2B%2010.99.)
![y = 2.89*-0.6020 + 10.99.](https://tex.z-dn.net/?f=y%20%3D%202.89%2A-0.6020%20%2B%2010.99.)
![y = -1.740 + 10.99.](https://tex.z-dn.net/?f=y%20%3D%20-1.740%20%2B%2010.99.)
![y = 9.25](https://tex.z-dn.net/?f=y%20%3D%209.25)
<em></em>
<em> --- approximated</em>
Ahh, basic shapes. Split up the weird shapes into easier ones. #1 can be truned into 2 trapezoids. #2 can be turned into 2 circles. #3 is a triangle and a trapezoid. #4 is 2 right triangles. #5 is a rectangel and a traingle. Finally, #6 is 3 traigles and a rectangle. Do you see how we broke the hard shapes into easier shapes?