Answer: 4:38 pm
I hope this help you
        
                    
             
        
        
        
Well the formula is : b1+b2/2 (h)
so the height would be solved as : 
13.5 = 3+6/2 (h)
13.5 = 9/2 (h)
h = (13.5)/(9/2)
h = (13.5) x (2/9)  *reciprocal*
h = (27) / (9)
h = 3
        
             
        
        
        
83.40/12 = 3.95
Each person pays $3.95.
Hope this helps! :D
        
                    
             
        
        
        
Answer:
1.107cm 2. 112 cm 
Step-by-step explanation:
your welcome