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serious [3.7K]
3 years ago
13

How many times smaller is 4 × 10-9 than 8 × 10-7? A. 200 B. 20 C. 20,000 D. 2,000

Mathematics
1 answer:
masya89 [10]3 years ago
4 0

Answer:

17

Step-by-step explanation:

4×10-9= 4

8×10-7=21

21-4=17

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