Civil Service Exam Reviewer · Basic Operations · hard
Multiply: (8 × 104) × (5 × 105). Express in scientific notation.
- 40 × 1020
- 4 × 108
- 13 × 109
- 4 × 1010
Answer
D. 4 × 1010
Solution
8 × 5 = 40 and 104 × 105 = 109. Normalized: 4 × 1010.
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