There's not quite enough information to answer this question. Miles is distance, and time is time. You would need something such as speed, which is distance/time, in order to determine the amount of time required to cover a certain distance.
For example, if you're traveling at 60 miles/hour, then to cover .45 miles:
.45 miles x 1 hr/60 miles = 0.0075 hours, or 27 seconds
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