Answer:
-9.4
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The mean is 7
Step-by-step explanation:
5,5,7,7,9,13 
9-7 is going to get 7
 
        
             
        
        
        
Answer: A. 289.5 
Method: 48.25 x 6 = 289.5
        
             
        
        
        
The remaining area that the grass will cover will be given by:
Area=[area of rectangle]-[area of the triangle]
area of rectangle will be:
A1=length*width
=20*8
=160 square feet
The area of the triangle will be:
A2=1/2absin theta
since the triangle is equilateral, all the angles are equal and the size of each angle is 60°. Thus the area will be:
A2=1/2*5*5sin 60
=18.3
thus the remaining area of the grass will be:
Area=160-18.3
=149.7 square feet