Answer:
The answer is A
Explanation:
4.397 * 10⁹
(3.700 * 10⁹) + (6.970 * 10⁸) = (3.700 * 10 * 10⁸ ) + (6.970 * 10⁸)
= (37.00 * 10⁸) + (6.970 * 10⁸)
= (37.00 + 6.970) * 10⁸
= 43.97 * 10⁸
= 4.397 * 10 * 10⁸
= 4.397 * 10⁽¹⁺⁸⁾
= 4.397 * 10⁹
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