andreswint123 andreswint123
  • 15-09-2017
  • Mathematics
contestada

490 buttons in 3 1/2 hours

490 buttons in 3 12 hours class=

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emilysambrano2 emilysambrano2
  • 15-09-2017
140 if finding how many by hour

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Аноним Аноним
  • 15-09-2017
fraction = 980/7
per hour - 140 buttons  a hour
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