Answer:
1. 5.00 × 10^–3.
2. 5.05 x 10^3
3. 8 x 10^-4
4. 1 x 10^
5. 1 x 10^6
6. 02.5.
7. 2.5 x 10^-2
8. 2.5 x 10^-3
9. 5 x 10^2
10. 5 x 10^3
hope it helps :)
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