Express 0.0000004720.0000004720.000000472 in scientific notation.
4.72×10−74.72 \times 10^{-7}4.72×10−7
4.72×1074.72 \times 10^{7}4.72×107
47.2×10−847.2 \times 10^{-8}47.2×10−8
0.472×10−60.472 \times 10^{-6}0.472×10−6