Answer:
y = -3(x+2)^2 - 6
Step-by-step explanation:
y = a(x+2)^2 -6
-18 = a(-2)^2 - 6
-12 = 4a
a = -3
Cube
It makes a cube
A=p(1+r/100)^n
=400(1+7/100)^2
=400*1.14
=456
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