Answer: 45
Step-by-step explanation: 
Complemntary angles result in a sum of 90. So, H=45 means 
45+J=90
90-45= 45
 
        
             
        
        
        
Answer:
1/10 x 1.2 is 0.12 
Step-by-step explanation:
so yeeeeeeee
 
        
             
        
        
        
9514 1404 393
Answer:
   128 ft
Step-by-step explanation:
The height of the tower above eye-height is related to the angle by ...
   Tan = Opposite/Adjacent
   tan(72°) = (tower height above eye height)/(40 ft)
   tower height above eye height = (40 ft)×tan(72°) = 123 ft
Since eye height is 5 ft, the total height of the tower from the ground is ...
   tower height = eye height + height above eye height
   tower height = 5 ft + 123 ft
   tower height = 128 ft