Which of the following is equivalent to 8.0×10−4+2.0×10−48.0 \times 10^{-4} + 2.0 \times 10^{-4}8.0×10−4+2.0×10−4?
1.0×10−31.0 \times 10^{-3}1.0×10−3
10×10−410 \times 10^{-4}10×10−4
1.6×10−71.6 \times 10^{-7}1.6×10−7
6.0×10−46.0 \times 10^{-4}6.0×10−4