$2000(2000^{2000}) = ?$
$\textbf{(A)} \ 2000^{2001}  \qquad \textbf{(B)} \ 4000^{2000}  \qquad \textbf{(C)} \ 2000^{4000}  \qquad \textbf{(D)} \ 4,000,000^{2000}  \qquad \textbf{(E)} \ 2000^{4,000,000}$
We can use an elementary exponents rule to solve our problem.
We know that $a^b\cdot a^c = a^{b+c}$. Hence,
$2000(2000^{2000}) = (2000^{1})(2000^{2000}) = 2000^{2000+1} = 2000^{2001} \Rightarrow \boxed{\textbf{(A) } 2000^{2001}}$
Solution edited by armang32324 and integralarefun