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| Math Central | Quandaries & Queries |
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Question from ROLY: Hi: I searched you database first,no luck. What is 2.5 million miles x 6 trillion miles (light year) This is the distance of the ANDROMEDA Galaxy .Thanks. Roly |
Hi Roly.
2.5 million light years times about 6 trillion miles per light year equals
(2.5 x 106) x (6 x 1012) = 15 x 1018.
Since 1018 is a "quintillion", that's fifteen "quintillion" miles.
In scientific notation, we'd simplify it to 1.5 x 1019 miles.
Cheers,
Stephen La Rocque.
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