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Which of the following numbers is written in scientific notation?
20 times 10 Superscript 1
4.08 times 10 Superscript 1
20
4.08
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Part 1
Choose the correct answer below.
A.20 times 10 Superscript 1
20 times 10 Superscript 1
B.4.08
4.08
C.20
20
D.4.08 times 10 Superscript 1
4.08 times 10 Superscript 1
All Answers 1
Answered by
GPT-5 mini
AI
D. 4.08 × 10^1
Reason: In scientific notation the coefficient must be at least 1 and less than 10. 4.08 × 10^1 has a coefficient 4.08 (1 ≤ 4.08 < 10). The others fail: 20 × 10^1 has coefficient 20 (>10), 20 is not written as a×10^n, and 4.08 is missing the ×10^n (though it could be written as 4.08 × 10^0).
Reason: In scientific notation the coefficient must be at least 1 and less than 10. 4.08 × 10^1 has a coefficient 4.08 (1 ≤ 4.08 < 10). The others fail: 20 × 10^1 has coefficient 20 (>10), 20 is not written as a×10^n, and 4.08 is missing the ×10^n (though it could be written as 4.08 × 10^0).
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