Jayfazzy Jayfazzy
  • 02-01-2020
  • Mathematics
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Which is the answer?

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DeanR
DeanR DeanR
  • 02-01-2020

The treadmill starts on low, from time 0 to 15 minutes.  Then at 15 the graph jumps up and stays up to 45, so for 30 minutes starting at t=15 the treadmill is on high.  Then we're back down to low from 45 to 60, 15 minutes.  Then it's off.

Answer: After 15 minutes she turned up to high for 30, then back down to low for 15 then off.   [top right choice]

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