Respuesta :

(4.2*10^-1)*(5.7*10^-1) = (4.2*5.7)*(10^-1 * 10^1)
23.94*10^-2 = .2394
moving the decimal one place to the left is the same thing as dividing by 10 or multiplying by
1/10. 2.394*10^-1, that is the answer you're looking for, B

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