4.92 ÷ 0.8 - 0.12 ÷ 0.3 = 5.75
Hope that helped:P
You multiply 9 by 4 and that's the area for that storage..
The answer for this would be $9.20
Hmmm recall, p=3, and "p" is the distance from the vertex to either, the focus or directrix, so if the focus is 3 units to one-side of the vertex, the directrix is 3 units to the other side
check the picture below