1) Volume = area * height => height = volume / area
2)
x^4 + 4x^3 + 3x^2 + 8x + 4
height = --------------------------------------
x^3 + 3x^2 + 8
That division is not exact
The result of this division is x + 1 plus a residue of - 8x^2 + 8x - 4.
It was expected an exact division, so likely some of the terms is not properly written. Now you know the procedure and can perform it with the right terms.
Amount of water after splash = 25(4/5) = 20L
Amount of water after Tina adds water = 20L + 7L = 27L
4.75 Kilometers, you just divide by 1000
