To simplify the expression \(6m^2 \cdot 2m^8\), we'll first multiply the coefficients (the numerical parts) and then apply the properties of exponents.
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Multiply the coefficients: \[ 6 \cdot 2 = 12 \]
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Multiply the terms with the same base (apply the property of exponents): \[ m^2 \cdot m^8 = m^{2+8} = m^{10} \]
Putting it all together: \[ 6m^2 \cdot 2m^8 = 12m^{10} \]
Therefore, the simplified expression is: \[ \boxed{12m^{10}} \]