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Math Help - word problem question

  1. #1
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    word problem question

    the speed of light is 1.863 x 10^5 miles per second.

    assume 1 year is 365 days. write an expression to convert speed of light from miles per second to miles per year

    make a table that shows the distance light travels in 1, 10, 100, 1000, 10000, 100000 years. our galazy has a diameter of about 5.875 x 10^17 miles. based on the tablem about how long would it take for light to travel across our galaxy.

    i have no idea what to do. help
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  2. #2
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    Quote Originally Posted by math1645 View Post
    the speed of light is 1.863 x 10^5 miles per second.

    assume 1 year is 365 days. write an expression to convert speed of light from miles per second to miles per year

    make a table that shows the distance light travels in 1, 10, 100, 1000, 10000, 100000 years. our galazy has a diameter of about 5.875 x 10^17 miles. based on the tablem about how long would it take for light to travel across our galaxy.

    i have no idea what to do. help
    You are given the speed of light as 1.863 x 10^5 mi/s. There are 60 s/min, 60 min/hr, 24 hr/day, and 365.25 day/yr. Notice how if you multiply those "fractions" together everything cancels except mi/yr?
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