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Charlie does the following problem:


3 3 · 3 2 = 3 6 = 3 · 3 · 3 · 3 · 3 · 3 = 729.


Which of the following is a true statement?


He is incorrect because he should have 6 factors of 9.

He is incorrect because he should have only 5 factors of 3.

He is incorrect because he should have 3 factors of 6.

He is correct.