Assume the iceberg is a cube of 1 331 000 m³ and that it melts so that the face which is totally

exposed to the air melts twice as quickly, i.e. the height is reduced by 2 metres each day.

Assume that the iceberg retains a cuboid shape.

(a) Find an expression for V, the volume of the iceberg after n days.

(b) Sketch the graph of V against n.