A polar bear sits on a piece of sea ice of a pentagonal prism.Climate change causes the ice sheet to melt.The ice sheet is 400 km tall with 20 km remaining above sea level.The base edge of the ice sheet is 40 km.If the height of ice sheet is melting at a rate of 7cm/s and the volume is decreasing at a rate of 0.000004km/s At what rate will the sides be changing once the ice reaches the sea level