Answer:
13.3 * 10^26
Explanation:
(1.898 * 10^27) - (5.68 * 10^26)
1.898 * 10^27 - 5.68 * 10^26
(1.898 * 10 - 5.68) * 10^26
(18.98 - 5.68) * 10^26
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