We are given that $a_1=2$ and $a_{10}$, so we can use the formula for the $n$th term of a geometric sequence:
$$a_n = a_1 r^{n-1}$$
Plugging in $n=10$, $a_1=2$, and $r=5$, we get:
$$a_{10} = 2 \cdot 5^{10-1} = 2 \cdot 5^9 = 2 \cdot 1953125 = 3906250$$
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