Yes it is a square number
        
                    
             
        
        
        
Answer:
3/4
Step-by-step explanation:
The mean of a data set is synonymous with the average. To find the mean, add up all the values in the data set and then divide by the number of elements. 
From the table, there is 12 values. Thus, add up all the 12 values and then divide by 12: 

Simplify: 

Reduce: 

Therefore, the mean of the data set is 3/4. 
For the data set, this means that the average person guesses the temperature too high by about 3/4°F. 
(Note: the symbol of x with a bar over it denotes the mean of a set)
 
        
             
        
        
        
3 meters below sea level represents a -3
From -3 to 0 is 3
3 + 5 above sea level = 8 meters
There are 8 meters between the house and the school
        
             
        
        
        
Answer: 72
We can use ratios
117 inches / 13 inches = 9
The corn cast shadow is 9 times bigger than the example we are given.
9 * 8 = <u><em>72</em></u>
 
        
                    
             
        
        
        
Is the picture a square
I can give better answer if I know
it wont let me type in the comments