1 km = 1 kilometer = 1000 meters
So 12 km = 12 000 meters
12 000 meters is about 32 times longer than 370 meters
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The kilo- prefix means 1000 The milli- prefix means 1/1000 = 0.001 → ½ km = 0.5 × 1000 m = 500 m → 370 mm = 370 × 0.001 m = 0.37 m → difference between ½ km and 370 mm is 500 m - 0.37 m = 499.63 m
370 km/ 87 hours ~= 4.25 km/hr
171,500,000 km
Yes. Having a zero as the last number in a figure with a decimal part to it does not change anything. * * * * * Except that the first expression implies that the value is accurate to 0.01 km while the second is accurate to 0.1 km. This means that the first could be any value between 2.595 km and 2.605 km whereas the second lies between 2.55 km and 2.65 km.
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