Answer:
21
Step-by-step explanation:
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Answer:

Explanation:
(3 × 10⁸) × 2 × 10³
3 × 10⁸ × 2 × 10³
3 × 2 × 10⁸ × 10³
6 × 10¹¹
In decimal: 600,000,000,000
Simplified to its simplest form would be 15/4. The GCD of them all would 400, so you divided them by 400.
Answer:
Step-by-step explanation:
8. 21+7 = 28
9. 73-17 =56
Answer:
-6
Step-by-step explanation:
Replace x with 1 and solve