Multiply or divide and write scientific notation for the result.(5 × 109)(9 × 108)
A. 45 × 1018
B. 45 × 1072
C. 4.5 × 1017
D. 4.5 × 1018
Answer: D
Mathematics
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A. Yes B. No
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A. 9 B. 81 C. 3 D. e
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Mathematics