The approximate total surface area of Earth is 5.1 × 108 km2 . All the salt water on Earth has an approximate surface area of 352,000,000 km2 , and all the freshwater on Earth has an approximate surface area of 9 × 106 km2. How much of Earth’s surface is covered by water, including both salt and fresh water? Write your answer in scientific notation. Use the ^ symbol to represent an exponent.

For example, 52 would be written as 5^2.

Write you answer in the format, 1*10^2.

(Do not include units, km^2, in your answer)