Shouldn’t it be the figures are similar? theyre the same size, along with the same measure of angles.
        
                    
             
        
        
        
Answer:
pic monga ulit ang labo kasi wh
 
        
             
        
        
        
Answer:

Step-by-step explanation:
The information that we kow about the shape of the aquarium: 
length: 

width: 

when the reef is submerged, the water level rises 3 feet. The volume that those 3 ft represent in the aquarium will be the volume of the reef. 
Thus, we calculate the volume of water "addition" with the same length and width as the aquarium but with a deep of 3 feet (thi is because the reef caused the water to rise 3 feet), and this is the volume of the reef that was added to the aquarium: 

The volume of the stone is 
 
        
             
        
        
        
What do you mean, "solve"?
y = -4(x-2)² + 4 
the line is a parabol with a maximum (2;4)
it's roots are  -4(x-2)² + 4  = 0 => (x-2)² = 1 => x-2 = 1 => x = 3
                                                              => x-2 = -1 => x = 1 
symetrical axe: x = 2
is that all you need?