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7.5

456 miles divided by 75 miles is 6.08 hours.

Then, 21 minutes times 4 rest stops equals 84 minutes.

84 min. divided by 60 min in an hour is 1.4 hours.

So, 6.08 plus 1.4 is 7.48 hours, which rounds up to 7.5 hours.

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15y ago

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