ANSWER
The radius is 4
EXPLANATION
The given equation is:

We complete the square to get the expression in standard form:


We factor using perfect squares to get:

This implies that,

Comparing to

The radius is r=4
 
        
             
        
        
        
Answer:
Surface area of the refrigerator is 864 in².
Step-by-step explanation:
Formula to calculate the surface area of a cube is,
Surface area = 6s²
Here, s = length of a side of the cube
If side length 's' = 12 inches
By substituting this value in the formula,
Surface area = 6(12)²
                      = 6 × 144
                      = 864 inch²
Therefore, surface area of the refrigerator is 864 in².
 
        
             
        
        
        
Answer:
The answer is  or
 or  .
 .
Step-by-step explanation:
Solve the following equation:

-Multiply  and
 and  to get
 to get 

So, now you have found the answer.
 
        
                    
             
        
        
        
Maximum area of the rectangle is 
<u>Explanation:</u>
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Considering the dimensions to be in cm

Putting the value of x = 3

 
 
Therefore, maximum area of the rectangle is 