Use trigonometry. 
cos(18°) = x/25
Multiply both sides by 25.
cos(18°)25 = x
23.7764129074 = x
We round off to the nearest hundredth. This means to round off to two decimal places.
Doing so, we get 23,78 cm = x. 
 
        
             
        
        
        
Area = 2pi*r*h + 2pi*r^2
 Area = 2pi*r(h + r)
 
 radius of 7 in and a height of 32 in
 Area = 14pi*39 = 546pi in^2
 
        
             
        
        
        
Your answer will be letter b
        
             
        
        
        
Answer:
The distance of helicopter from the injured person is 542.82 feet  
Step-by-step explanation:
Given as :
The height of the hovering helicopter above the ground = h = 450 feet
The angle of elevation from injured person to helicopter = Ф = 56°
Or, Let the distance of of helicopter from person = x feet
Now, From Triangle
∵ Sin Ф = 
∴  Sin 56° = 
Or, 0.8290 = 
Or , x = 
I.e x = 542.82 feet
So, The distance from injured person to helicopter = 542.82 feet
Hence The distance of helicopter from the injured person is 542.82 feet  Answer
 
        
             
        
        
        
There is actully no different only the fromt number changes