7.5 x 10-4
7.5 x 10-3
7.5 x 10-2
7.5 x 10-1
Correct answer is B
0.3×1050.4×107=3×10−1×1054×10−1×107
3x1044x104
34 x 104-6 = 0.75 x 10-2
= 7.5 x 10-3
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