Perimeter
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perimeter.
Because distance=rate * time. If you travel for 30 minutes @ 60 mph then your distance would be: 60 miles/hour * .5 hr = 30 miles. Now if you want to fiqure in the earth's rotation about it's axis and rotation around the sun and the sun's travel in the galaxy, then you've really got a problem! netflyer
It is 690
triangle
54.26 rounded to 1 significant figure is 50