4.0 x 10-3
5.0 x 10-2
2.0 x 10-1
5.0 x 10-3
Correct answer is A
(1.25×10−4)×(2.0×10−1)(6.25×105) = 1.25×26.25 x 104 - 1 - 5
2.506.25 x 10-2 = 250625 x 10-2
0.4 x 10-2 = 4.0 x 10-3
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