SOLUTION
Let us use a simple diagram to interprete the question 
In the diagram above, the dark stuff below represents the shadow and the rectangular bar represents the building. I have labelled the height of the building as h. 
So we will use the right-angled triangle formed to find h
As we can see h represents the opposite side and 56.5 feet represents the adjacent side of the right-angle triangle. So we will use TOA

So we have 

Hence the answer is 104.9 feet to the nearest tenth
 
        
             
        
        
        
The answer is 3/4. You divide both numbers (54 and 72) by 18 and you get 3/4. Hope it helps!
        
             
        
        
        
Answer:
hope this helps :)
Step-by-step explanation:
8:07
Cylinder volume & surface area (video)
 
        
             
        
        
        
Answer:
11:13
Step-by-step explanation:
132:156
Split in half
66:78
Again
33:39
By 3
11:13