Respuesta :

Answer: A

Step-by-step explanation:

(9*10^9)*(-2*10^-3)=

9*(-2)*10^9*10*-3=

-18*10^(9+(-3))=

-18*10^(9-3)=-18*10^6 ==> A

[tex](9\cdot 10^9)\cdot (-2\cdot 10^{-3})\implies (9)(-2)\qquad (10^9\cdot 10^{-3}) \\\\\\ (-18)\qquad (10^{9-3})\implies -18\cdot 10^6[/tex]

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