AMC 8 2011 Problem 15

How many digits are in the product $4^5 \cdot 5^{10}$ ? $\textbf{(A) } 8 \textbf{(B) } 9 \textbf{(C) } 10 \textbf{(D) } 11 \textbf{(E) } 12$

Dataset text NuminaMath-1.5. Quoted with source.

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