9514 1404 393
Answer:
5.7×10^6 mi
Explanation:
(1.9×10^5 mi/s) × (3.0×10^1 s) = 5.7×10^6 mi
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Additional comment
When I can see that the product will have a mantissa that has a value greater than 10 or less than 1, I like to adjust the factors so the mantissa of the product comes out in the range 1-10. Here, we could adjust 1.9 to 0.19, or 30 to 3.0. We chose the latter.
Moving the decimal point of 30.0 1 place to the left means we increase the corresponding exponent by 1 (from 0 to 1). 30.0×10^0 = 3.00×10^1