Answer:
7i
Step-by-step explanation:
We know that  i = √-1 
Then solving the given:
- √-49 = √49×(-1) = √49 × √-1 = 7×√-1 = 7i
So the answer is:
 
        
             
        
        
        
Answer:
236 cubic units (to 3 significant figures)
Step-by-step explanation:
volume of a cylinder =  r²h   (where r = radius and h = height)
r²h   (where r = radius and h = height)
Therefore, volume =  x 5² x 3
 x 5² x 3 
                                =  x 25 x 3
 x 25 x 3 
                                = 75 
 
                                = 236 cubic units (to 3 significant figures)
 
        
             
        
        
        
Answer:
the surface of hexagonal prism is 12 cm
 
        
             
        
        
        
Answer:
[See Below]
Step-by-step explanation:
✦ Combine like terms: 
   ✧ -5n + 2n = -3n
✦ Rewrite:
   ✧ 3 < -3n
✦ Divide: 
   ✧ 3 / -3 = -1
So n = -1.
~<em>Hope this Helps Mate. If you need anything feel free to message me. </em>
 
        
                    
             
        
        
        
1/2 and 3/4 those are greater then 1/4 and less then 1