If k is a positive integer and n=7.049*10^k, what is the

If $k$ is a positive integer and $n=7.049 \cdot 10^k,$ what is the value of $k?$

(1) $7,500 < n < 75,000$

(2) $10^4 < n <10^5$

[spoiler]OA=D[/spoiler]

Source: GMAT Paper Test

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