Answer:
Step-by-step explanation:
I suppose the expression is this 
We can factor out this expression ( Remember, find two numbers that the sum is 9 and the product is 8. The numbers are 8 and 1)

 
        
                    
             
        
        
        
The building is 24 (whatever’s you want ex. Meters, Feet) high. Because 38.7=tan^-1(height/30). Or cos(38.7)=30/hypotenuse. Hypotenuse=30/cos(38.7
        
             
        
        
        
Answer:
hb      Step-by-step explanation:
 
        
             
        
        
        
36 and 12
36+12=48 and 36-12=24