Answer
$10^{10}$ is closer to $10^{50}$
Work Step by Step
$|10^{50}-10^{10}|<10^{50}$
However, $|10^{101}-10^{100}|=10^{100}|10-1|=9*10^{100}>10^{50}$
Therefore, $10^{10}$ is closer to $10^{50}$.
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