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If Sasha can run 720 yards in 4 minutes, how many feet can she run in 15 seconds?

Please explain how to do this....I'm stuck on it...I don't understand it...

Respuesta :

Okay so you're trying to find the unit rate of 720yds/4min. If you divide 720 by 4 you will have the unit rate as 180yds/1 min or 60 sec then if you divide 180 and 60 by 4 again you will get the answer of 45yds/15sec.

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