Answer: -4 8/11, -4.79, 4.709, 4 7/9
Step-by-step explanation:
The discount is 10%



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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey
You should use a double number number line

so... if you notice, the vertex is at h,k and that'd be the origin, 0,0
so...since the directrix is "p" units from the vertex, so it'd be 2 units from 0,0
now, the parabola has an equation with a positive leading term's coefficient, namely the 1/8 is positive, thus, the parabola is opening upwards, and the directrix is "outside" the parabola, so is below the vertex
that puts the directrix 2 units below 0,0
y = -2