What is (7.5×106)÷(2.5×102)(7.5 \times 10^6) \div (2.5 \times 10^2)(7.5×106)÷(2.5×102)?
3.0×1043.0 \times 10^43.0×104
3.0×1033.0 \times 10^33.0×103
5.0×1045.0 \times 10^45.0×104
3.0×1083.0 \times 10^83.0×108