<div dir="ltr">John,<div><br></div><div>The problem you have posed is a variation of the classic "Fermi problem," which asked one to estimate the number of piano tuners in Chicago.</div><div><br></div><div>Let me recommend to you the book <i>Guesstimation</i>, which gives you suggestions for solving this type of problem when you don't know anything.  You can get the book from Amazon at</div><div><br></div><div><a href="https://www.amazon.com/Guesstimation-Solving-Worlds-Problems-Cocktail/dp/0691129495/ref=sr_1_1?crid=JX3NWHR6HDT0&keywords=guesstimation+book&qid=1695475669&sprefix=guesstimati%2Caps%2C157&sr=8-1">Amazon.com: Guesstimation: Solving the World's Problems on the Back of a Cocktail Napkin: 9780691129495: Weinstein, Lawrence, Adam, John A.: Books</a><br></div><div><br></div><div>I used to teach first-year graduate students in a medical physics program this material since most of them had never seen this type of problem before.  They should have learned how to guesstimate much earlier than grad school.</div><div><br></div><div>George</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Sep 23, 2023 at 7:20 AM <<a href="mailto:jjrudy1@comcast.net">jjrudy1@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg5493231390277233243"><div lang="EN-US" style="overflow-wrap: break-word;"><div class="m_5493231390277233243WordSection1"><p class="MsoNormal"><span style="font-size:14pt">The average person would not be able to do this, and wouldn’t even care.  But to me it is beauty.  Of course I have not verified the numbers.<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><img width="359" height="688" style="width: 3.7343in; height: 7.1614in;" id="m_5493231390277233243Picture_x0020_3" src="cid:image001.png@01D9EDFF.33E465F0"><span style="font-size:12pt;font-family:Arial,sans-serif"><u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif">John Rudy<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif">781-861-0402<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif">781-718-8334  cell<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif">13 Hawthorne Lane<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif">Bedford MA<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10pt;font-family:Arial,sans-serif"><a href="mailto:jjrudy1@comcast.net" target="_blank">jjrudy1@comcast.net</a><u></u><u></u></span></p><p class="MsoNormal"><img border="0" width="124" height="115" style="width: 1.2916in; height: 1.1927in;" id="m_5493231390277233243Picture_x0020_1" src="cid:image002.png@01D9EDFF.33E465F0"><span style="font-size:10pt;font-family:Arial,sans-serif"><u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p></div></div></div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr">George Starkschall</div><div dir="ltr"><br></div></div></div></div>