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How can I round this number to two significant figures?

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fizzyBee | 18:31 Fri 25th Sep 2009 | Science
3 Answers
2300 000 000 000 kg

I have to keep it in kg but round it to two significant figures. HELP! :(
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Avatar Image Jumbuck
2.3 X 10^12 kg ?
18:54 Fri 25th Sep 2009
Avatar Image beso
2.3 trillion kilograms
09:37 Sat 26th Sep 2009
Avatar Image factor-fiction
The way you have written it, it is already rounded to two significant figures. But the format suggested by Jumbuck is less unwieldy and will be what your teacher is looking for,
18:31 Sat 26th Sep 2009

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