This past Wednesday, a dear friend who is pericardiac physical therapist sent me the following text (shown to the left) asking me to convert feet/seconds to miles/hour. I was thrilled to but I was shopping with no pen and only had receipts for paper. I paused shopping and worked out the problem (thank you dimensional analysis) after borrowing a pen from a cashier.

I took a picture of my work and sent her the solution. Excited to teach dimensional analysis this year and use this as an example.

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**Correction update*****

Whoops. The conversion is actually 8.2 miles per hour. I forgot to type in a '0' in phone calculator and messed up the decimal. Thanks for pointing this out NS!