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OpenStudy (anonymous):
Use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places (8.1 • 10⁷) • (4.2 • 10⁹)
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OpenStudy (anonymous):
\[(8.1*4.2)(10^7*10^9)\] If the 8.1*4.2>10, then move a "10" to the right part.
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