Answer:
In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series, or any expression; it is usually a number, but may be any expression.
Step-by-step explanation:
the thousands
7 is millions
4 is hundred thousands
9 is ten thousands
1 is thousands
2 is hundreds
8 is tens
5 is ones
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Answer: 7.2x10 3