# A Conversion problem featuring Significant figures [closed]

What is the speed of a car going v=1.000 mile per hour in SI units? You can do each conversion separately. Use the facts that 1mile=1609 meters and 1hour=3600 seconds. Express your answer in meters per second to four significant figures.

Okay first I set the problem to the right conversions. I do this

$(1000 miles / 1 hour)$ * $(1609 meters / 1 miles)$ * $*(1hour/ 3600 seconds)$

Thus I get 446.9 m/s however this is not the right answer. I could use some guidence towards where I went wrong.

## closed as off-topic by tpg2114♦, Brandon Enright, Jim, dmckee♦Aug 31 '14 at 0:40

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• Is the car going 1.000 miles per hour or 1,000 miles per hour? There's an odd decimal point in the first sentence. – HDE 226868 Aug 30 '14 at 19:19
• Perhaps this is why I got the problem wrong let me revaluate the problem. – Jon Aug 30 '14 at 19:22
• Well, first, what is the correct answer? – HDE 226868 Aug 30 '14 at 19:22
• The correct answer is .4469 m/s – Jon Aug 30 '14 at 19:25
• So that might be the issue, then. – HDE 226868 Aug 30 '14 at 19:26

$(1.000 miles / 1 hour)$ * $(1609 meters / 1 miles)$ * $*(1hour/ 3600 seconds)$ Thus $.4469$ meter/second\$