Yahoo Answers is shutting down on 4 May 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Lv 612,518 points

Alan

Favourite answers20%
Answers2,134

Retired, 55 + years experience -- reside in Anaheim, California. My career -- photofinishing and manufacture of photo film processing and printing devises both optical/chemical and digital. I manufactured light measuring instruments used to measure films and prints. I manufactured control films to calibrate photo instrumentation. I worked for a time as quality control for Dynacolor,the film manufacturing arm of 3M making a Kodachrome knock-off color slide film. I taught summer continuing education classes at the Professional Photographer's of America School.

  • How many registers needed?

    How many cash registers needed?

    8 shoppers arrive every minute

    on average it takes 2 minutes to handle a transaction

    goal is no shopper must wait more than 5 minutes

    how to solve and how to solve with different variables 

    Mathematics8 months ago