Cos(60) = cos(90 - 30) = sin(30) = 1/2
This should be what you want.
        
             
        
        
        
Total ratio=9+11=20
number of girls=11/20*400
                          =220
        
                    
             
        
        
        
take x =initial deposit amount. then make equation:
x+75.5+55.25-25.15-18.65 = 210.85
simplify:
x+86.95 = 210.85
x=210.85 - 86.95
x=123.90
so Initial deposit amount is $123.90
check:  210.85+18.65+25.15-55.25-75.5 = 123.9
123.9 = 123.9
 
        
             
        
        
        
First, look at the x axis (this is the one labeled Minutes Used per month)
Find the number 40, then look at where the lines meet on that line. The red line for Plan B it’s at 8 dollars. The blue line for Plan A is at 4 dollars.
Plan B costs more.
To find the difference, subtract 4 from 8.
$8 - $4 = $4
Plan B costs 4 dollars more than Plan A.
If you have any further questions feel free to ask.
Hope this helps.
 
        
             
        
        
        
Answer:
So I'd say 20in^2 or 22in^2.
Step-by-step explanation:
I decided to make it into a full pentagon shape to just estimate.
So a pentagons sides are all equal so I counted the amount in boxes on the sides of the regular shape and most of them would be 3.5 if you changed the shape into a pentagon. 
And I got:
--> 21.076