1. Total area of water = 352,000,000 + 9 * 10^6
= 352,000,000 + 9,000,000 = 361,000,000 = 3.61 * 10^8
Fraction of the surface covered by water = 3.61 * 10^8 / 5.1 * 10^8
= 3.61 / 5.1 = 0.707843 = 70.78 % to nearest hundredth of a percent.
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