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Sophia types 75 words per minute and is just starting to write a term paper . patty already has 510 words written and types at a speed of 60 words per minute. for what numbers of minutes will Sophia have more words type than patty ?
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Answer :

The way I would look at it is that Sophia types 15 words per minute faster than Patty so every minute Sophia is 15 minutes closer to what Patty has done. 510/15=34 so after 34 minutes Sophia will have caught up to Patty

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