Civil Service Exam Reviewer · Basic Operations · hard
Multiply: (3 × 103) × (5 × 105). Express in scientific notation.
- 15 × 1015
- 1.5 × 107
- 1.5 × 109
- 8 × 108
Answer
C. 1.5 × 109
Solution
3 × 5 = 15 and 103 × 105 = 108. Normalized: 1.5 × 109.
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