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18 May, 14:37

A light year is approximately 6x10 to the power of 12 miles. If a star is 2.4x10 to the power of 13 miles from the Earth, how many light years away from Earth is the star?

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  1. 18 May, 15:05
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    4 light years

    Step-by-step explanation:

    (2.4·10¹³ miles) / (6·10¹² miles/ly) = 0.4·10¹ ly = 4 light years

    __

    The applicable rule of exponents is ...

    (a^b) / (a^c) = a^ (b-c)
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