How? I don't fully understand this

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Bob Barcklay asked Aug 22, 2023

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45 votes

How? I don't fully understand this

Mathematics
high-school

Bob Barcklay asked Aug 22, 2023

by Bob Barcklay

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$(9\cdot 10^9)\cdot (-2\cdot 10^(-3))\implies (9)(-2)\qquad (10^9\cdot 10^(-3)) \\\\\\ (-18)\qquad (10^(9-3))\implies -18\cdot 10^6$

Matt Casto answered Aug 23, 2023

by Matt Casto

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27 votes

Answer: A

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

Nimsrules answered Aug 27, 2023

by Nimsrules

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