(2x)sqrt 2- 64y2 is the answer
        
             
        
        
        
Option D, 63 cm
Explanation:
The scale of model is of local park  is 
This means that each dimension of the model is 21 times smaller than the actual park (to be developed in future)
Given -
Depth of the pond  centi meter
Depth of the real pond will be 21 times of the depth of the model.
Thus , real pond's depth is equal to
 cm
Hence, option D is correct
 
        
             
        
        
        
Answer:
Write the problem as a mathematical expression.
X=−1/5; f(x)=(25/2)x+(−91/2)
Replace the variable x with x=−1/5 in the expression.
f(−1/5)=(25/2)(−1/5)−91/2
Simplify the result.
−48
Step-by-step explanation:
 
        
             
        
        
        
Answer:
300
Step-by-step explanation:
2(5)²(1+5)
2(25)(6)
50(6)
300
 
        
                    
             
        
        
        
Answer:
the right answer is 18 and under for part a for part b the answer is 45 -64