Question

scientists have estimated that the area of Earth covered by water is 70.98 percent ,or 362,031,100 km^2.Express this value in scentific notation

Answer 1

3.620311*10^8 km^2
Since their osnt a period at the end of this number then the two 0's at the end are not counted as significant numbers

Answer 2

70.87%  =  7.087 x 10⁻¹