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by likewhoa » Tue Nov 20, 2007 12:48 am
The age of the Earth is approximately 1.3 X 10^17 seconds, and one year is approximately 3.2X10^7 seconds. Which of the following is closest to the age of the eath in years?

4.1X10^9

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by Suyog » Tue Nov 20, 2007 11:40 am
13 * 10^7* 10^9 / 3.2 * 10^7 = 4.1 * 10^9

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by rahul.s » Sat Jan 09, 2010 1:39 am
Suyog wrote:13 * 10^7* 10^9 / 3.2 * 10^7 = 4.1 * 10^9
Hi Suyog,

Could you please elaborate?

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by papgust » Sat Jan 09, 2010 3:11 am
Earth's age = (1.3 * 10^17) OR (13 * 10^16) OR (13 * 10^(9+7)) OR (13 * 10^9 * 10^7)

A year = 3.2 * 10^7

Earth's age/year = (13 * 10^9 * 10^7) / 3.2 * 10^7 = (13 * 10^9) / 3.2 = 4.1 * 10^9

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by rahul.s » Sat Jan 09, 2010 3:20 am
papgust wrote:Earth's age = (1.3 * 10^17) OR (13 * 10^16) OR (13 * 10^(9+7)) OR (13 * 10^9 * 10^7)

A year = 3.2 * 10^7

Earth's age/year = (13 * 10^9 * 10^7) / 3.2 * 10^7 = (13 * 10^9) / 3.2 = 4.1 * 10^9
Thank you papgust :-)