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Muiltply (1.2 x 10^28) x (3 x 10 negative ^19). Expres the answer in scientific notation.

A. 3.6 X 10^9
B. 3.6 X 10^9
C. 36 X 10^10
D. 36 X 10^10

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the answer is A..... ..
User Kevin Simple
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