Let's say it takes about 5 seconds to count to ten out loud. How many years will it take to count out loud to a billion? Ignore leap years and round your answer to one decimal place.

 May 22, 2017

15.9 years. Crazy, isn't it?


These type of questions are best answered with proportions:




Cross multiply and solve:



\(x=500000000secs\) (5 hundred million seconds)


Now, let's use another proportion to solve for how many years:



Cross multiply and solve again:





That's insane! Almost 16 years!

 May 22, 2017

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