(8−4)×10−7 m(8-4) \times 10^{-7} \mathrm{~m}(8−4)×10−7 m
(7−4)×10−7 m(7-4) \times 10^{-7} \mathrm{~m}(7−4)×10−7 m
(10−4)×10−10 m(10-4) \times 10^{-10} \mathrm{~m}(10−4)×10−10 m
(4−1)×10−7 m(4-1) \times 10^{-7} \mathrm{~m}(4−1)×10−7 m
