Please solve the Problems below and round to the correct sig figs: 1. 0.961 - 0.07

2. 0.961 - 0.0700

3. 540.0 X 2.02

4. 540 x 2.02

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.