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Answer:
18 c^6
Explanation:
We can use the rules of exponents to simplify the expression.
2c⁵ * 9c
We know that a^b * a^d = a^(b+d)
2*9 = 18
c^5 * c = c^(5+1) = c^6
2c⁵ * 9c = 18 c^6