My Math Forum The distance d in miles that a person can see on a clear day from height h is .......

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April 17th, 2017, 02:48 PM   #1
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The distance d in miles that a person can see on a clear day from height h is .......

The distance d in miles that a person can see on a clear day from height h is given by
d=g (h)=1.22 sq root h

For b would I now replace 20320 with any numbers?
Thanks
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 April 17th, 2017, 04:34 PM #2 Math Team     Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1587 Answer the question first, then evaluate for values of h > 20320 ... keep it reasonable since h is in ft. Thanks from GIjoefan1976
April 17th, 2017, 04:47 PM   #3
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Quote:
 Originally Posted by GIjoefan1976 The distance d in miles that a person can see on a clear day from height h is given by d=g (h)=1.22 sq root h For b would I now replace 20320 with any numbers? Thanks
Thanks, well I would think it decreases since we keep going higher and we keep getting a decimal.but since they already started so high up so maybe I should only go up by one foot to 5 feet each time?

 April 17th, 2017, 05:03 PM #4 Math Team     Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1587 (1) if you were flying in an airplane, could you see a farther horizontal distance by climbing or descending? (2) small changes in units won't change $d$ by much ... try increasing by a few thousand feet of change for each input. Thanks from GIjoefan1976
April 17th, 2017, 05:39 PM   #5
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Quote:
 Originally Posted by skeeter (1) if you were flying in an airplane, could you see a farther horizontal distance by climbing or descending? (2) small changes in units won't change $d$ by much ... try increasing by a few thousand feet of change for each input.
Thanks for putting it that way!

 April 17th, 2017, 05:45 PM #6 Senior Member   Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10 Could someone tell me how to do C ? Or what I could look up on youtube to learn how to do it? it looks like possibly my teacher used division? Thanks!!
 April 17th, 2017, 06:17 PM #7 Math Team     Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1587 $d=1.22\sqrt{h} \implies h = \left(\dfrac{d}{1.22}\right)^2$ sub in 100 for $d$ ...

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