Financial Math

Activity 6: A large gear with 72 teeth is turning 500 rpm and is in mesh with a small gear with 12 teeth. How fast is the small gear turning?(3000 rpm) Activity 7: If you spend 7 hours a day sleeping, approximately what percentage of your day is spent sleeping? (29%) Activity 8: Bob works 25 hours during the week and sells $600 of merchandise. ................
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