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The miles of track in the U.S. railroad system peaked in the early $1900$s. At that time, more than $270,000$ miles of track crisscrossed the country. What is the approximate amount of track written in scientific notation?$\newline$Choices:$\newline$(A) $3 \times 10^4$ miles$\newline$(B) $3 \times 10^5$ miles$\newline$(C) $3 \times 10^6$ miles$\newline$(D) $3 \times 10^7$ miles