Answer:
2.1 x 10^5 = 210,000.
Explanation:
Convert 2.1 x 10^5 to ordinary form
10^5 = 100000
2.1 = 21/10
Thus.
2.1 x 10^5 = 21/10 * 100000 = 210,000
Ordinary form of 2.1 x 10^5 is 210,000.
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