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 Question from Joe: If the next closest galaxy is 15 quadrillion miles away and there are 8760 hours in one year; how fast would a UFO have to fly to travel from the next galaxy, in MPH in one year ? Google calculator gives this result: 1.7123288e+12 I don't understand what the "e+12" means. How is that pronounced, ex. trillion, quadrillion etc..?

Hi Joe,

e+12 means that you multiply by $10^{12},$

thus for example

$5.5795 \mbox{e+6} = 5.5795 \times 10^6 = 5.5795 \times 100,000 = 5,579,500.$

For the names I would look at Billions and More. On this page it says that $10^{12}$ is one trillion so 1.7123288e+12 is one point seven one two three two eight eight trillion or write it
1,712,328,800,000.

I hope this helps,
Harley

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