Answer:
6561·m·m·m·m
Explanation:
You want the expression (9m)^4 written without exponents.
Exponent
An exponent tells you the number of times the base is a factor in the product:
(9m)^4 = (9m)·(9m)·(9m)·(9m) = 9·9·9·9·m·m·m·m = 6561·m·m·m·m
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