The general or standard form of a parabola is
(y-k) = a(x+h)^2
h,k are the intersection points of parabola
Intersection points are where y= 0, or x=0
itsnorigin at (,0,0)that means h=0, k=0
it passes through points (-1,2) and (1,2)
So then
y= ax^2 , 2 = a (-1)^2
this means a= 2
Then results standard form equation
Y = 2• X^2
 
        
             
        
        
        
1 acre = 43560 square feet
43560 = 484 * X
X=43560/484 = 90
the width = 90 feet
 
        
             
        
        
        
Answer:
can u explain the question 
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And I will answer asap
 
        
             
        
        
        
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first one 
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7
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