Answer:
Step-by-step explanation:
Where is the list 
 
        
                    
             
        
        
        
2x8x40=$160 which is the labour cost
revenue=$2000
therefore the labor cost as a percentage of Revenue is ($160/$2000) x 100
which equals 8%
        
             
        
        
        
You can use trigonometry and the tangent to get:
tan(11°)=150/x
so x=772 ft